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Document And Entity Information - shares	3 Months Ended
Document And Entity Information - shares	Mar. 31, 2020	May 01, 2020
Cover [Abstract]
Entity Registrant Name	ICF International, Inc.
Entity Central Index Key	0001362004
Trading Symbol	ICFI
Security Exchange Name	NASDAQ
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		18,827,268
Document Type	10-Q
Document Period End Date	Mar. 31, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-33045
Entity Tax Identification Number	22-3661438
Entity Incorporation State Country Code	DE
Entity Address, Address Line One	9300 Lee Highway
Entity Address, City or Town	Fairfax
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	22031
City Area Code	703
Local Phone Number	934-3000
Security12bTitle	Common Stock
Entity Interactive Data Current	Yes
Document Quarterly Report	true
Document Transition Report	false

CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 58,661	$ 6,482
Contract receivables, net	238,474	261,176
Contract assets	151,558	142,337
Prepaid expenses and other assets	19,885	17,402
Income tax receivable	10,280	7,320
Total Current Assets	478,858	434,717
Property and Equipment, net	61,951	58,237
Other Assets:
Goodwill	905,177	719,934
Other intangible assets, net	70,048	25,829
Operating lease - right-of-use assets	145,344	133,965
Other assets	22,645	23,352
Total Assets	1,684,023	1,396,034
Current Liabilities:
Current portion of long-term debt	10,000
Accounts payable	92,818	134,578
Contract liabilities	29,318	37,413
Operating lease liabilities - current	33,333	32,500
Accrued salaries and benefits	57,615	52,130
Accrued subcontractors and other direct costs	34,906	45,619
Accrued expenses and other current liabilities	31,893	35,742
Total Current Liabilities	289,883	337,982
Long-term Liabilities:
Long-term debt	506,979	164,261
Operating lease liabilities - non-current	128,990	119,250
Deferred income taxes	39,494	37,621
Other long-term liabilities	27,921	22,369
Total Liabilities	993,267	681,483
Contingencies (Note 18)
Stockholders’ Equity:
Preferred stock, par value $.001; 5,000,000 shares authorized; none issued
Common stock, par value $.001; 70,000,000 shares authorized; 23,106,335 and 22,846,374 shares issued at March 31, 2020 and December 31, 2019, respectively; 18,827,268 and 18,867,555 shares outstanding at March 31, 2020 and December 31, 2019, respectively	23	23
Additional paid-in capital	350,658	346,795
Retained earnings	552,303	544,840
Treasury stock, 4,279,067 and 3,978,819 shares at March 31, 2020 and December 31, 2019, respectively	(188,961)	(164,963)
Accumulated other comprehensive loss	(23,267)	(12,144)
Total Stockholders’ Equity	690,756	714,551
Total Liabilities and Stockholders’ Equity	$ 1,684,023	$ 1,396,034

CONSOLIDATED BALANCE SHEETS (UNAUDITED) (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Statement Of Financial Position [Abstract]
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	70,000,000	70,000,000
Common stock, issued (in shares)	23,106,335	22,846,374
Common stock, outstanding (in shares)	18,827,268	18,867,555
Treasury stock, shares (in shares)	4,279,067	3,978,819

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenue	$ 358,238	$ 341,254
Direct costs	230,616	215,949
Operating costs and expenses:
Indirect and selling expenses	103,271	96,519
Depreciation and amortization	5,179	4,762
Amortization of intangible assets	2,853	2,135
Total operating costs and expenses	111,303	103,416
Operating income	16,319	21,889
Interest expense	(3,525)	(2,453)
Other income (expense)	190	(412)
Income before income taxes	12,984	19,024
Provision for income taxes	2,372	3,706
Net income	$ 10,612	$ 15,318
Earnings per Share:
Basic	$ 0.56	$ 0.81
Diluted	$ 0.55	$ 0.80
Weighted-average Shares:
Basic	18,840	18,825
Diluted	19,197	19,263
Cash dividends declared per common share	$ 0.14	$ 0.14
Other comprehensive (loss) income, net of tax	$ (11,123)	$ 283
Comprehensive (loss) income, net of tax	$ (511)	$ 15,601

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash Flows from Operating Activities
Net income	$ 10,612	$ 15,318
Adjustments to reconcile net income to net cash used in operating activities:
Bad debt expense	444	(159)
Deferred income taxes	4,756	3,144
Non-cash equity compensation	3,826	4,151
Depreciation and amortization	8,032	6,897
Facilities consolidation reserve	(71)	(67)
Amortization of debt issuance costs	246	127
Other adjustments, net	(766)	(264)
Changes in operating assets and liabilities, net of the effects of acquisitions:
Net contract assets and liabilities	(17,349)	(23,152)
Contract receivables	40,488	8,236
Prepaid expenses and other assets	(1,070)	1,353
Accounts payable	(49,200)	(15,561)
Accrued salaries and benefits	4,453	5,913
Accrued subcontractors and other direct costs	(10,326)	(8,796)
Accrued expenses and other current liabilities	(5,835)	(8,705)
Income tax receivable and payable	(2,996)	(757)
Other liabilities	(476)	(366)
Net Cash Used in Operating Activities	(15,232)	(12,688)
Cash Flows from Investing Activities
Capital expenditures for property and equipment and capitalized software	(4,704)	(7,539)
Payments for business acquisitions, net of cash received	(253,021)	(1,819)
Net Cash Used in Investing Activities	(257,725)	(9,358)
Cash Flows from Financing Activities
Advances from working capital facilities	744,331	163,240
Payments on working capital facilities	(389,776)	(131,346)
Debt issue costs	(2,081)
Proceeds from exercise of options	37	404
Dividends paid	(2,639)	(2,636)
Net payments for stock issuances and buybacks	(23,998)	(15,218)
Net Cash Provided by Financing Activities	325,874	14,444
Effect of Exchange Rate Changes on Cash, Cash Equivalents, and Restricted Cash	(738)	305
Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	52,179	(7,297)
Cash, Cash Equivalents, and Restricted Cash, Beginning of Period	6,482	12,986
Cash, Cash Equivalents, and Restricted Cash, End of Period	58,661	5,689
Supplemental Disclosure of Cash Flow Information
Interest	3,892	1,597
Income taxes	$ 895	$ 1,066

Basis of Presentation and Nature of Operations

3 Months Ended

Mar. 31, 2020

Accounting Policies [Abstract]

Basis of Presentation and Nature of Operations

NOTE 1 - BASIS OF PRESENTATION AND NATURE OF OPERATIONS

Basis of Presentation

The accompanying consolidated financial statements include the accounts of ICF International, Inc. and its subsidiaries (collectively, the “Company”), and have been prepared in accordance with United States (“U.S.”) generally accepted accounting principles (“U.S. GAAP”). All significant intercompany transactions and balances have been eliminated.

Nature of Operations

The Company provides professional services and technology-based solutions to government and commercial clients, including management, marketing, technology, and policy consulting and implementation services, in the areas of: energy, environment, and infrastructure; health, education and social programs; safety and security; and consumer and financial services. The Company offers a full range of services to these clients throughout the entire life cycle of a policy, program, project, or initiative, from research and analysis, and assessment and advice to design and implementation of programs and technology-based solutions, and the provision of engagement services and programs.

The Company’s major clients are U.S. federal government departments and agencies, most significantly the Department of Health and Human Services, Department of State and Department of Defense. The Company also serves U.S. state (including territories) and local government departments and agencies, international governments, and commercial clients worldwide. Commercial clients include airlines, airports, electric and gas utilities, oil companies, hospitals, health insurers and other health-related companies, banks and other financial services companies, transportation, travel and hospitality firms, non-profits/associations, law firms, manufacturing firms, retail chains, and distribution companies. The term “federal” or “federal government” refers to the U.S. federal government, and “state and local” or “state and local government” refers to U.S. state (including territories) and local governments, unless otherwise indicated.

The Company, incorporated in Delaware, is headquartered in Fairfax, Virginia. It maintains offices throughout the world, including more than 75 offices in the U.S. and U.S. territories and 15 offices in key markets outside the U.S., including offices in the United Kingdom, Belgium, China, India, and Canada.

Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of revenue and expenses during the reporting periods. Areas of the consolidated financial statements where estimates may have the most significant effect include contractual and regulatory reserves, valuation and lives of tangible and intangible assets, contingent consideration related to business acquisitions, impairment of goodwill and long-lived assets, accrued liabilities, revenue recognition and costs to complete fixed-price contracts, bonus and other incentive compensation, stock-based compensation, reserves for tax benefits and valuation allowances on deferred tax assets, provisions for income taxes, collectability of receivables, and loss accruals for litigation. Actual results experienced by the Company may differ from management's estimates.

Interim Results

The unaudited consolidated financial statements included in this Quarterly Report on Form 10-Q have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). These rules and regulations permit some of the information and footnote disclosures normally included in financial statements, prepared in accordance with U.S. GAAP, to be condensed or omitted. In management’s opinion, the unaudited consolidated financial statements contain all adjustments that are of a normal recurring nature, necessary for a fair presentation of the results of operations and financial position of the Company for the interim periods presented. The Company reports operating results and financial data in one operating segment and reporting unit. Operating results for the three months periods ended March 31, 2020 and 2019 are not necessarily indicative of the results that may be expected for the full year. These unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements for the fiscal year ended December 31, 2019 and the notes thereto included in the Company’s Annual Report on Form 10-K, filed with the SEC on February 28, 2020 (the “Annual Report”).

Reclassifications

As part of an amendment to the Credit Facility, as defined in Note 4 “Long-term Debt” below, the Company currently has both a term loan and a revolving debt facility within its Credit Facility. Previously, the unamortized debt issuance costs was included within Other assets in accordance with U.S. GAAP. The Company has reclassified unamortized debt issuance costs as of December 31, 2019 as Long-term debt for consistency of presentation.

Significant Accounting Policies

Goodwill

The Company tests for impairment, at a minimum, on an annual basis or earlier where certain events or changes in circumstances indicate that goodwill may more likely than not be impaired. As of March 31, 2020, the Company’s market capitalization based on its stock price was above its book value and has not fluctuated below book value subsequent to that date. The Company has experienced declines in the market price of its stock subsequent to the end of the first quarter as a result of the impact from the COVID-19 pandemic on the global economy. If there are significant decreases in its stock price for a sustained period or other unfavorable factors, the Company may be required to perform a goodwill impairment assessment, which may result in a recognition of goodwill impairment that could be material to the consolidated financial statements.

Long-Lived Assets

The Company reviews its long-lived assets, including property and equipment and amortizable intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amounts of the assets may not be fully recoverable. If the total of the expected undiscounted future net cash flows is less than the carrying amount of the asset, a loss is recognized for any excess of the carrying amount over the fair value of the asset.

Leases

The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets and operating lease liabilities (current and non-current) on the consolidated balance sheets.

Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments as of the commencement date. Since most lease agreements do not provide an implicit rate, the Company uses its incremental borrowing rate as of the commencement date in estimating the present value of future payments. The operating lease ROU asset is based on the present value of future lease payments and excludes impacts from lease incentives and initial costs incurred to obtain the lease. Lease terms, for the purposes of determining each lease’s present value, include options to extend or terminate the lease if it is reasonably certain and economically reasonable that the Company will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.

The Company uses leases to obtain use of a variety of different resources, including those for the use of facilities or equipment. These agreements may contain both lease and non-lease components, which are generally accounted for separately. For equipment leases (including copier leases), the Company accounts for the lease component, as well as insignificant non-lease components, as a single lease.

Recent Accounting Pronouncements

Recent Accounting Pronouncements Adopted

Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract

In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40). The standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is considered a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The standard also requires the entity to expense the capitalized implementation costs of a hosting arrangement over the term of the hosting arrangement and present the expense related to the capitalized implementation costs in the same line item in the statement of income as the fees associated with the hosting arrangement. The Company adopted the standard in the first quarter of 2020 and the standard was implemented using the prospective method. The Company’s adoption of ASU 2018-15 did not have a material impact on the consolidated financial statements.

Measurement of Credit Losses on Financial Instruments

In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments. The standard, as amended, requires companies to measure credit losses by using a methodology that reflects the expected credit losses based on historical information, current economic conditions, and reasonable and supportable information. The Company adopted the standard in the first quarter of 2020 utilizing a modified-retrospective transition approach that required a cumulative-effect adjustment of $0.5 million to the opening retained earnings in the consolidated statement of stockholders’ equity as of the date of the adoption.

Recent Accounting Pronouncements Not Yet Adopted

Reference Rate Reform

In March 2020, FASB issued ASU 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The standard is intended to provide temporary optional expedients and exceptions to the U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. This guidance is effective beginning on March 12, 2020, and the Company may elect to apply the amendments prospectively through December 31, 2022. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements.

Contract Receivables, Net

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Contract Receivables, Net

NOTE 2 – CONTRACT RECEIVABLES, NET

Contract receivables, net consisted of the following:

	March 31, 2020			December 31, 2019
Billed and billable	$	242,808		$	264,682
Allowance for doubtful accounts		(4,334	)		(3,506	)
Contract receivables, net	$	238,474		$	261,176

Goodwill

3 Months Ended

Mar. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill

NOTE 3 – GOODWILL

The changes in the carrying amount of goodwill during the three-months period ended March 31, 2020 were as follows:

Balance as of December 31, 2019	$	719,934
Goodwill resulting from business combination - ITG		188,339
Effect of foreign currency translation		(3,096	)
Balance as of March 31, 2020	$	905,177

Long-Term Debt

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Long-Term Debt

NOTE 4 – LONG-TERM DEBT

At March 31, 2020 and December 31, 2019, debt consisted of:

	March 31, 2020						December 31, 2019
	Average Interest Rate			Outstanding Balance			Average Interest Rate			Outstanding Balance
Term Loan				$	200,000					$	—
Revolving Credit					320,000						165,444
Total before debt issuance costs		3.05	%		520,000			3.59	%		165,444
Unamortized debt issuance costs					(3,021	)					(1,183	)
				$	516,979					$	164,261

Current portion of long-term debt				$	10,000					$	—
Long-term debt - non-current					506,979						164,261
				$	516,979					$	164,261

On March 3, 2020, the Company entered into the First Amendment (the “First Amendment”) to the Fifth Amended and Restated Business Loan and Security Agreement with a group of ten commercial banks (the “Credit Facility”). The First Amendment amended the Fifth Amended and Restated Business Loan and Security Agreement to, among other things, (i) add a new term loan facility in the original principal amount of $200.0 million; (ii) increase the swing line commitment amount by $25.0 million to $75.0 million; (iii) extend the maturity date; and (iv) modify certain definitions and certain covenants. As a result, the Credit Facility now consists of (i) a term loan facility of $200.0 million; (ii) a revolving line of credit of up to $600.0 million with additional revolving credit commitments of up to $300.0 million, subject to lenders’approval; and (iii) a sub-limit of $75.0 million for swing line loans. The Credit Facility matures on March 3, 2025.

The Company has the option to borrow funds under the Credit Facility at interest rates based on both LIBOR (1, 3, or 6-month rates) and the Base Rate (as defined herein), at its discretion, plus their applicable margins. Base Rates are fluctuating per annum rates of interest equal to the highest of (i) the Federal Funds Open Rate, plus 0.5%, (ii) the Prime Rate (as defined under the Credit Facility) and (iii) the daily LIBOR rate, plus a LIBOR Margin between 1.00% and 2.00% based on its Leverage Ratio (as defined under the Credit Facility). The interest accrued based on LIBOR rates is to be paid on the last business day of the interest period (1, 3, or 6 months), while interest accrued based on the Base Rate is to be paid in quarterly installments. The Credit Facility also provides for letters of credit aggregating up to $60.0 million, which reduce the funds available under the Credit Facility when issued. The unused portion of the Credit Facility is subject to a commitment fee between 0.13% and 0.25% per annum based on the Leverage Ratio.

The Credit Facility is collateralized by substantially all the assets of the Company and requires that the Company remain in compliance with certain financial and non-financial covenants. The financial covenants require, among other things, that the Company maintain at all times an Interest Coverage Ratio (as defined under the Credit Facility) of not less than 3.00 to 1.00 and a Leverage Ratio of not more than 4.00 to 1.00 (subject to a step-up to 4.25 to 1.0 for a four quarter period following permitted acquisitions as defined under the Credit Facility) for each fiscal quarter. As of March 31, 2020, the Company had elected to step-up its leverage ratio covenant and was in compliance with its covenants under the Credit Facility.

As of March 31, 2020, the Company had $520.0 million long-term debt outstanding from the Credit Facility (including the term loan, exclusive of unamortized debt issuance costs), outstanding letters of credit totaling $2.9 million, net derivative obligations of $9.9 million and unused borrowing capacity of $277.1 million under the Credit Facility (excluding the accordion). Taking into account the financial, performance-based limitations, available borrowing capacity (excluding the accordion and the term loan) was $125.6 million as of March 31, 2020.

Future repayments of debt principal are as follows:

			Payments due by March 31,
	2021		2022		2023		2024		2025		Thereafter		Total
Term Loan	$	10,000	$	10,000	$	10,000	$	15,000	$	155,000	$	—	$	200,000
Revolving Credit		—		—		—		—		320,000		—		320,000
Total	$	10,000	$	10,000	$	10,000	$	15,000	$	475,000	$	—	$	520,000

Leases

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Leases

NOTE 5 – LEASES

The Company has operating leases for facilities and equipment which have remaining terms ranging from 1 to 14 years. The leases may include options to extend the lease periods for up to 5 years at rates approximating market rates and/or options to terminate the leases within 1 year. The leases may include a residual value guarantee or a responsibility to return the property to its original state of use. A limited number of leases contain provisions that provide for rental increases based on consumer price indices. The change in rent expense resulting from changes in these indices are included within variable rent.

Operating leases consisted of the following at March 31, 2020 and December 31, 2019:

	March 31, 2020			December 31, 2019
Real estate facilities	$	178,227		$	165,752
Office equipment		2,269			1,631
Other		863			892
		181,359			168,275
Amortization of right-of-use assets		(36,015	)		(34,310	)
Total operating lease right-of-use assets	$	145,344		$	133,965

Rent expense is recognized on a straight-line basis over the lease term. Rent expense consists of the following:

	Three Months Ended
	March 31, 2020		March 31, 2019
Operating lease costs	$	9,326	$	8,896
Short-term lease costs		431		681
Variable lease costs		1		4
Total rent expense	$	9,758	$	9,581

Future minimum lease payments under non-cancellable leases as of March 31, 2020 were as follows:

March 31, 2021	$	39,815
March 31, 2022		39,877
March 31, 2023		33,163
March 30, 2024		20,008
March 30, 2025		22,838
Thereafter		193,009
Total future minimum lease payments		348,710
Less: Interest		(186,387	)
Total operating lease liabilities	$	162,323

Operating lease liabilities - current	$	33,333
Operating lease liabilities - non-current		128,990
Total operating lease liabilities	$	162,323

Other information related to operating leases is as follows:

	March 31, 2020			March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	9,526		$	9,389
Right-of-use assets obtained in exchange for new operating lease liabilities	$	21,098		$	2,159
Weighted-average remaining lease term - operating leases		6.0			5.1
Weighted-average discount rate - operating leases		3.6	%		3.8	%

At March 31, 2020, the Company had additional operating leases that have not yet commenced with a potential lease liability of $129.8 million. Such operating leases are anticipated to commence, where we take possession of the property and commence any required buildout, over the next three years, with lease terms of 5 years to 17 years.

Other Comprehensive (Loss) Income and Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2020

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Other Comprehensive (Loss) Income and Accumulated Other Comprehensive Loss

NOTE 6 – OTHER COMPREHENSIVE (LOSS) INCOME AND ACCUMULATED OTHER COMPREHENSIVE LOSS

Other comprehensive (loss) income includes foreign currency translation adjustments arising from the conversion of financial statements of foreign subsidiaries into U.S. dollars, the amortization of the gain on the sale of an interest rate hedge agreement, and the change in the fair value of current interest rate hedge agreements. Components of accumulated other comprehensive loss as of March 31, 2020 and 2019 are as follows:

	Three Months Ended March 31, 2020
	Foreign Currency Translation Adjustments			Gain on Sale of Interest Rate Hedge Agreement ⁽¹⁾			Change in Fair Value of Interest Rate Hedge Agreements ⁽²⁾			Total
Accumulated other comprehensive (loss) income at December 31, 2019	$	(10,995	)	$	1,634		$	(2,783	)	$	(12,144	)
Current period other comprehensive (loss) income:
Other comprehensive loss before reclassifications		(5,430	)		—			(8,601	)		(14,031	)
Amounts reclassified from accumulated other comprehensive income ⁽⁴⁾		—			(180	)		230			50
Effect of taxes⁽³⁾		612			47			2,199			2,858
Total current period other comprehensive (loss) income		(4,818	)		(133	)		(6,172	)		(11,123	)
Accumulated other comprehensive (loss) income at March 31, 2020	$	(15,813	)	$	1,501		$	(8,955	)	$	(23,267	)

	Three Months Ended March 31, 2019
	Foreign Currency Translation Adjustments			Gain on Sale of Interest Rate Hedge Agreement ⁽¹⁾			Change in Fair Value of Interest Rate Hedge Agreement ⁽²⁾			Total
Accumulated other comprehensive (loss) income at December 31, 2018	$	(14,168	)	$	2,164		$	(547	)	$	(12,551	)
Current period other comprehensive (loss) income:
Other comprehensive (loss) income before reclassifications ⁽⁴⁾		1,254			—			(1,164	)		90
Amounts reclassified from accumulated other comprehensive income		—			(180	)		23			(157	)
Effect of taxes⁽³⁾		—			47			303			350
Total current period other comprehensive (loss) income		1,254			(133	)		(838	)		283
Accumulated other comprehensive (loss) income at March 31, 2019	$	(12,914	)	$	2,031		$	(1,385	)	$	(12,268	)

(1)

Represents the unamortized value of an interest rate hedge agreement, designated as a cash flow hedge, which was sold on December 1, 2016. The fair value of the interest rate hedge agreement, at the date of the sale, was recorded in other comprehensive income, net of tax, and is being reclassified to interest expense when earnings are impacted by the hedged items and as interest payments are made on the Credit Facility from January 31, 2018 to January 31, 2023 (see Note 10—Derivative Instruments and Hedging Activities).

(2)

Represents the change in fair value of interest rate hedge agreements designated as a cash flow hedge. The fair value of the interest rate hedge agreements was recorded in other comprehensive income and will be reclassified to interest expense when earnings are impacted by the hedged items and as interest payments are made on the Credit Facility from August 31, 2018 to February 28, 2025 (see Note 10—Derivative Instruments and Hedging Activities).

(3)	The Company’s effective tax rate for the three months ended March 31, 2020 and 2019 was 18.3% and 19.5%, respectively.

(4)	The Company expects to reclassify $0.7 million net gains related to the Gain on Sale of Interest Rate Hedge Agreement and $2.5 million net losses related to the Change in Fair Value of Interest Rate Hedge Agreement from accumulated other comprehensive loss into earnings during the next 12 months.

Stockholders' Equity

3 Months Ended

Mar. 31, 2020

Stockholders Equity Note [Abstract]

Stockholders' Equity

NOTE 7 – STOCKHOLDERS’ EQUITY

Changes in stockholders’ equity for the three months ended March 31, 2020 and 2019 are as follows:

	Three Months Ended March 31, 2020
	Common Stock					Additional Paid-in		Retained			Treasury Stock					Accumulated Other Comprehensive
	Shares			Amount		Capital		Earnings			Shares		Amount			Loss			Total
Balance at December 31, 2019		18,868		$	23	$	346,795	$	544,840			3,978	$	(164,963	)	$	(12,144	)	$	714,551
Net income		—			—		—		10,612			—		—			—			10,612
Other comprehensive income		—			—		—		—			—		—			(11,123	)		(11,123	)
Equity compensation		—			—		3,826		—			—		—			—			3,826
Exercise of stock options		1			—		37		—			—		—			—			37
Issuance of shares pursuant to vesting of restricted stock units		269			—		—		—			—		—			—			—
Net payments for stock issuances and buybacks		(311	)		—		—		—			311		(23,998	)		—			(23,998	)
Cumulative-effect adjustment for adoption of accounting principle		—			—		—		(513	)		—		—			—			(513	)
Dividends declared		—			—		—		(2,636	)		—		—			—			(2,636	)
Balance at March 31, 2020		18,827		$	23	$	350,658	$	552,303			4,289	$	(188,961	)	$	(23,267	)	$	690,756

	Three Months Ended March 31, 2019
	Common Stock					Additional Paid-in		Retained			Treasury Stock					Accumulated Other Comprehensive
	Shares			Amount		Capital		Earnings			Shares		Amount			Loss			Total
Balance at December 31, 2018		18,817		$	22	$	326,208	$	486,442			3,629	$	(139,704	)	$	(12,551	)	$	660,417
Net income		—			—		—		15,318			—		—			—			15,318
Other comprehensive loss		—			—		—		—			—		—			283			283
Equity compensation		—			—		4,151		—			—		—			—			4,151
Exercise of stock options		11			—		404		—			—		—			—			404
Issuance of shares pursuant to vesting of restricted stock units		255			1		—		—			—		—			—			1
Net payments for stock issuances and buybacks		(217	)		—		—		—			217		(15,369	)		—			(15,369	)
Dividends declared		—			—		—		(2,634	)		—		—			—			(2,634	)
Balance at March 31, 2019		18,866		$	23	$	330,763	$	499,126			3,846	$	(155,073	)	$	(12,268	)	$	662,571

Restricted Cash

3 Months Ended

Mar. 31, 2020

Cash And Cash Equivalents [Abstract]

Restricted Cash

NOTE 8 – RESTRICTED CASH

The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the consolidated balance sheets for the periods presented to the total of cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows for the three months ended March 31, 2020 and 2019:

	2020				2019
	Beginning		Ending		Beginning		Ending
Cash and cash equivalents	$	6,482	$	58,661	$	11,694	$	5,689
Restricted cash - non-current		—		—		1,292		—
Total of cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	6,482	$	58,661	$	12,986	$	5,689

Revenue Recognition

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Revenue Recognition

NOTE 9 – REVENUE RECOGNITION

Disaggregation of Revenue

The Company disaggregates revenue from clients, most of which is earned over time, into categories that depict how the nature, amount and uncertainty of revenue and cash flows are affected by economic factors. Those categories are client market, client type and contract mix. Client markets provide insight into the breadth of the Company’s expertise. In classifying revenue by client market, the Company attributes revenue from a client to the market that the Company believes is the client’s primary market. The Company also classifies revenue by the type of entity for which it does business, which is an indicator of the diversity of its client base. The Company attributes revenue generated from being a subcontractor to a commercial company as government revenue when the ultimate client is a government agency or department. Disaggregation by contract mix provides insight in terms of the degree of performance risk that the Company has assumed. Fixed-price contracts are considered to provide the highest amount of performance risk as the Company is required to deliver a scope of work or level of effort for a negotiated fixed price. Time-and-materials contracts require the Company to provide skilled employees on contracts for negotiated fixed hourly rates. Since the Company is not required to deliver a scope of work, but merely skilled employees, it considers these contracts to be less risky than a fixed-price agreement. Cost-based contracts are considered to provide the lowest amount of performance risk since the Company is generally reimbursed for all contract costs incurred in performance of contract deliverables with only the amount of incentive or award fees (if applicable) dependent on the achievement of negotiated performance requirements.

Increases in revenue in the three months ended March 31, 2020 compared to the prior year period were primarily from the health, education, and social programs client market as a result of additional work performed for government clients. Revenue from time-and-materials contracts for the three months ended March 31, 2020 increased as compared to the three months ended March 31, 2019.

	Three Months Ended March 31,
	2020					2019
	Dollars		Percent			Dollars		Percent
Client Markets:
Energy, environment, and infrastructure	$	151,362		42	%	$	153,403		45	%
Health, education, and social programs		143,423		40	%		121,423		35	%
Safety and security		31,585		9	%		29,551		9	%
Consumer and financial services		31,868		9	%		36,877		11	%
Total	$	358,238		100	%	$	341,254		100	%

	Three Months Ended
	March 31, 2020					March 31, 2019
	Dollars		Percent			Dollars		Percent
Client Type:
U.S. federal government	$	155,375		44	%	$	132,092		39	%
U.S. state and local government		61,330		17	%		65,950		19	%
International government		23,092		6	%		27,135		8	%
Total Government		239,797		67	%		225,177		66	%
Commercial		118,441		33	%		116,077		34	%
Total	$	358,238		100	%	$	341,254		100	%

	Three Months Ended
	March 31, 2020					March 31, 2019
	Dollars		Percent			Dollars		Percent
Contract Mix:
Time-and-materials	$	168,213		47	%	$	155,182		45	%
Fixed price		133,128		37	%		134,448		40	%
Cost-based		56,896		16	%		51,624		15	%
Total	$	358,238		100	%	$	341,254		100	%

Contract Balances:

Contract assets consist primarily of unbilled amounts resulting from long-term contracts when revenue recognized exceeds the amount billed often due to billing schedule timing. Contract liabilities result from advance payments received on a contract or from billings in excess of revenue recognized on long-term contracts due to billing schedule timing. The net contract assets (liabilities) as of March 31, 2020 increased by $17.3 million as compared to December 31, 2019. The increase in contract assets is primarily due to work in the health, education and social programs and energy, environmental, and infrastructure client markets for the U.S. federal government, most of which has been performed on time-and-materials contracts. There were no material changes to contract balances due to impairments or business combinations during the period.

	March 31, 2020			December 31, 2019			$ Change		% Change
Contract assets	$	151,558		$	142,337		$	9,221		6.5	%
Contract liabilities		(29,318	)		(37,413	)		8,095		(21.6	%)
Net contract assets (liabilities)	$	122,240		$	104,924		$	17,316		16.5	%

Performance Obligations:

The Company had $1.5 billion in unfulfilled performance obligations as of March 31, 2020, which primarily entail the future delivery of services for which revenue will be recognized over time. The obligations relate to continued or additional services required on contracts and were generally valued using an estimated cost-plus margin approach, with variable consideration being estimated at the most likely amount. The Company expects to satisfy these performance obligations, on average, in one to two years.

Derivative instruments and Hedges Activities

3 Months Ended

Mar. 31, 2020

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivative instruments and Hedges Activities

NOTE 10 – DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES

The Company manages its risk to changes in interest rates through the use of derivative instruments. The Company does not hold derivative instruments for trading or speculative purposes. For variable rate borrowings, the Company uses fixed interest rate swaps, effectively converting a portion of the variable interest rate payments to fixed interest rate payments. These swaps are designated as cash flow hedges.

On February 20, 2020, the Company entered into a floating-to-fixed interest rate swap for an aggregate notional amount of $100.0 million to hedge a portion of the Company’s variable rate indebtedness. The Company designated the swap as a cash flow hedge. The swap requires the Company to pay a fixed rate of 1.294% per annum on the notional amount starting on February 28, 2020 to February 28, 2025. The floating-to-fixed interest rate settles monthly during the period of the cash flows and the realized gains and losses from the swap are recognized as a component of interest expense. On a quarterly basis, management evaluates the swap to determine its effectiveness and record the change in fair value as an adjustment to other comprehensive income or loss. Management intends that the swap remain effective.

A summary of interest rate swap derivatives designated as cash flow hedges as of March 31, 2020 are as follows:

				Dates of Effected Cash Flows
Date of Interest Rate Swap Agreement	Notional Amount ($million)		Paid Fixed Interest Rate%	Beginning	Ending
September 30, 2016 ⁽¹⁾	$	100.0	-	January 31, 2018	January 31, 2023
August 31, 2017	$	25.0	1.8475%	August 31, 2018	August 31, 2023
August 8, 2018	$	50.0	2.8540%	August 31, 2018	August 31, 2023
August 8, 2018	$	25.0	2.8510%	August 31, 2018	August 31, 2023
February 20, 2020	$	100.0	1.2940%	February 28, 2020	February 28, 2025

(1)

On December 1, 2016, the Company sold the interest rate hedge agreement. The fair value of the interest rate hedge, as of the date of the sale, was recorded in other comprehensive income, net of tax. The gain from the sale will be recognized into earnings when earnings are impacted by the cash flows of the previously hedged variable interest rate.

Income Taxes

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 11 – INCOME TAXES

The Company’s effective tax rate for the three months ended March 31, 2020 and 2019 was 18.3% and 19.5%, respectively.

The Company is subject to federal income taxes as well as taxes in various state, local and foreign jurisdictions. Tax statutes and regulations within each jurisdiction are subject to interpretation and require the application of significant judgment. The Company’s 2016 through 2018 tax years remain subject to examination by the Internal Revenue Service for federal tax purposes. Certain significant state, local and foreign tax returns also remain open under the applicable statute of limitations and are subject to examination for the tax years from 2015 to 2018.

The Company does not have any liability for unrecognized tax positions as of March 31, 2020. There were no tax positions that, if recognized, would have a favorable impact on the Company’s effective tax rate.

The Company does not recognize accrued interest and penalties related to unrecognized tax positions as a component of tax expense. The Company has made no provision for deferred U.S. income taxes or additional foreign taxes on future unremitted earnings of its controlled foreign subsidiaries because the Company considers these earnings to be permanently invested.

Accounting for Stock Compensation

3 Months Ended

Mar. 31, 2020

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Accounting for Stock Compensation

NOTE 12 – ACCOUNTING FOR STOCK COMPENSATION

On April 4, 2018, the Company’s board of directors approved the 2018 Omnibus Incentive Plan (the “2018 Omnibus Plan”), which was subsequently approved by the stockholders and became effective on May 31, 2018 (the “Effective Date”). The 2018 Omnibus Plan replaced the previous 2010 Omnibus Incentive Plan (the “Prior Plan”).

On or after the Effective Date, the 2018 Omnibus Plan allows the Company to grant 1,185,000 shares using stock options, stock appreciation rights, restricted stock, restricted stock units (“RSUs”), performance units and performance share awards (“PSAs”), and other stock-based awards to all officers, key employees, and non-employee directors of the Company. Outstanding shares granted under the Prior Plan, totaling 109,832 as of March 31, 2020, remain subject to its terms and conditions, and no additional awards from the Prior Plan are to be made after the Effective Date. As of March 31, 2020, the Company had approximately 669,643 shares available for grant under the 2018 Omnibus Plan. The 2018 Omnibus Plan also gives the Company the ability to issue cash-settled RSUs (“CSRSUs”). The CSRSUs have no impact on the shares available for grant under the Omnibus Plan, nor on the calculated shares used in earnings per share calculations.

During the three months ended March 31, 2020, the Company granted to its employees 164,468 shares in the form of RSUs with an average grant date fair value of $57.76, and the equivalent value of 110,895 shares in the form of CSRSUs with an average grant date fair value of $57.76. During the three months ended March 31, 2020, the Company also granted 55,264 shares in the form of PSAs to its employees with a grant date fair value of $58.76 per share. The RSUs, CSRSUs and PSAs granted are generally subject to service-based vesting conditions, with the PSAs also having performance-based vesting conditions. The performance conditions for the PSAs granted in 2020 have a performance period from January 1, 2020 through December 31, 2022 and the performance conditions are consistent with the PSAs granted in prior years.

The Company recognized stock-based compensation expense of $5.1 million and $6.7 million for the three months ended March 31, 2020 and 2019, respectively. Unrecognized compensation expense of approximately $20.6 million as of March 31, 2020 related to unsettled RSUs is expected to be recognized over a weighted-average period of 2.41 years. The unrecognized compensation expense related to CSRSUs totaled approximately $11.7 million at March 31, 2020 and is expected to be recognized over a weighted-average period of 2.1 years. Unrecognized compensation expense related to PSAs of approximately $6.5 million as of March 31, 2020 is expected to be recognized over a weighted-average period of 1.8 years.

Fair Value

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value

NOTE 13 – FAIR VALUE

Financial instruments measured at fair value on a recurring basis and their location within the accompanying consolidated balance sheets are as follows:

	March 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total		Location on Balance Sheet
Assets:
Forward contract agreements	$	—	$	233	$	—	$	233	Prepaid expenses and other assets
Deferred compensation investments in cash surrender life insurance		—		12,707		—		12,707	Other assets
Total	$	—	$	12,940	$	—	$	12,940

Liabilities:
Deferred compensation plan liabilities	$	—	$	12,294	$	—	$	12,294	Other long-term liabilities
Interest rate swaps		—		12,183		—		12,183	Other long-term liabilities
Total	$	—	$	24,477	$	—	$	24,477

	December 31, 2019
(in thousands)	Level 1		Level 2		Level 3		Total		Location on Balance Sheet
Assets:
Forward contract agreements	$	—	$	733	$	—	$	733	Prepaid expenses and other assets
Deferred compensation investments in cash surrender life insurance				15,020				15,020	Other assets
Total	$	—	$	15,753	$	—	$	15,753

Liabilities:
Deferred compensation plan liabilities	$	—	$	14,855	$	—	$	14,855	Other long-term liabilities
Interest rate swaps		—		3,811		—		3,811	Other long-term liabilities
Total	$	—	$	18,666	$	—	$	18,666

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Business Combination

3 Months Ended

Mar. 31, 2020

Business Combinations [Abstract]

Business Combination

NOTE 14 – BUSINESS COMBINATION

On January 31, 2020, the Company acquired all of the membership interests in Incentive Technology Group, LLC (“ITG”), a Virginia limited liability company, for the purchase price of $255.0 million (subject to post-closing and working capital adjustments). Headquartered in Arlington, Virginia, ITG is an information technology consulting firm that provides cloud-based platform services to the federal government. The acquisition is expected to augment the Company’s federal government business. The acquisition was not significant to the Company’s financial statements taken as a whole. The acquisition of ITG includes provisions that adjust the consideration transferred for excesses or shortfalls in the stipulated amount of working capital as of the acquisition date, as defined.

The acquisition was accounted for under the purchase method. The preliminary allocation of the total purchase price to the tangible and intangible assets and liabilities of ITG is based on management’s preliminary estimate of fair value as of the acquisition date and is subject to revision until the purchase price adjustments and valuations of intangible assets and goodwill are finalized, which will occur prior to September 30, 2020. The Company engaged an independent valuation firm to assist management in the allocation of the purchase price to goodwill and to other acquired intangible assets. The excess of the purchase price over the estimated fair value of the net tangible assets acquired was approximately $235.6 million. The Company has allocated approximately $188.3 million to goodwill and $47.3 million to other intangible assets. The goodwill recorded as part of the acquisition primarily reflects the value of providing an established platform to leverage the Company’s existing digital interactive technologies and domain expertise, synergies expected to arise from providing end-to-end customer solutions to a combined client-base across all channels, as well as any intangible assets that do not qualify for separate recognition. The weighted average amortization period for the amount allocated to other intangible assets in total is 5.7 years from the acquisition date. The intangible assets consist of approximately $46.4 million of customer-related intangibles that are being amortized over 6.9 years from the acquisition date and $0.9 million of marketing-related intangibles that are being amortized over 0.9 years from the acquisition date. The ITG acquisition is treated as a deemed asset purchase for income tax purposes; therefore, goodwill and amortization of other intangibles created via this acquisition will be amortized for income tax purposes over 15 years.

A prior acquisition’s purchase agreement included additional consideration in the form of two warranty and indemnity hold back payments, one for approximately $1.9 million to be released in the second quarter of 2020 and the other for approximately $1.2 million scheduled to be released in the fourth quarter of 2022. The two warranty and indemnity liabilities were recorded at their fair value at the date of the acquisition discounting the liabilities at 3.0% and 3.25%, respectively.

Earnings Per Share

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Earnings Per Share

NOTE 15 – EARNINGS PER SHARE

Earnings per share (“EPS”) is computed by dividing reported net income by the weighted-average number of shares outstanding. Diluted EPS considers the potential dilution that could occur if common stock equivalents were exercised or converted into stock. The difference between the basic and diluted weighted-average equivalent shares with respect to the Company’s EPS calculation was due entirely to the assumed exercise of stock options and the vesting and settlement of RSUs and PSAs. PSAs are included in the computation of diluted shares only to the extent that the underlying performance conditions (i) are satisfied as of the end of the reporting period or (ii) would be considered satisfied if the end of the reporting period were also the end of the applicable performance period and the result would be dilutive under the treasury stock method.

As of March 31, 2020, the PSAs granted during the year ended December 31, 2018 met the related performance conditions for the initial performance period and were included in the calculation of diluted EPS. However, the PSAs granted during the year ended December 31, 2019 and during the three months ended March 31, 2020 have not yet completed their initial two-year performance period and therefore were excluded in the calculation of diluted EPS. There were no weighted-average shares excluded from the calculation of EPS because they were anti-dilutive for the three months ended March 31, 2020 and 31,840 weighted-average shares were excluded for the three months ended March 31, 2019. The anti-dilutive shares were associated with RSUs.

The dilutive effect of stock options, RSUs, and PSAs for each period reported is summarized below:

	Three Months Ended
	March 31,
	2020		2019
Net Income	$	10,612	$	15,318

Weighted-average number of basic shares outstanding during the period		18,840		18,825
Dilutive effect of stock options, RSUs, and performance shares		357		438
Weighted-average number of diluted shares outstanding during the period		19,197		19,263

Basic earnings per share	$	0.56	$	0.81
Diluted earnings per share	$	0.55	$	0.80

Share Repurchase Program

3 Months Ended

Mar. 31, 2020

Equity [Abstract]

Share Repurchase Program

NOTE 16 – SHARE REPURCHASE PROGRAM

The Company’s share repurchase program previously allowed for share repurchases in the aggregate up to $100.0 million under share repurchase plans approved by the board of directors pursuant to Rules 10b5-1 and 10b-18 under the Securities Exchange Act of 1934, as amended. On March 13, 2020, the Company terminated the Rule 10b5-1 plan element of the share repurchase program. The Credit Facility permits unlimited share repurchases, provided the Company’s Leverage Ratio, prior to and after giving effect to such repurchases, is not greater than 3.50 to 1.00. As of March 31, 2020, $9.4 million remained available for share repurchases under the Credit Facility.

Subsequent Events

3 Months Ended

Mar. 31, 2020

Subsequent Events [Abstract]

Subsequent Events

NOTE 17 – SUBSEQUENT EVENTS

Dividend

On May 5, 2020, the Company’s board of directors approved a $0.14 per share cash dividend. The dividend will be paid on July 14, 2020 to shareholders of record as of the close of business on June 12, 2020.

COVID-19

The Company is closely monitoring the impact of the coronavirus (“COVID-19”), which has caused a global pandemic. The assessment is on-going and encompasses all aspects of the Company’s business, including how COVID-19 will impact its customers, employees, subcontractors and other suppliers and business partners and the capital markets. Although the Company did not experience significant disruptions during the three months ended March 31, 2020, the Company continues to assess the financial impacts to its business based on currently known events. However, the Company is unable to fully predict the impact COVID-19 will have on its future financial position, results of operations, or cash flows.

Contingencies

3 Months Ended

Mar. 31, 2020

Commitments And Contingencies Disclosure [Abstract]

Contingencies

NOTE 18 – CONTINGENCIES

Litigation and Claims

The Company is involved in various legal matters and proceedings arising in the ordinary course of business. While these matters and proceedings cause it to incur costs, including, but not limited to, attorneys’ fees, the Company currently believes that any ultimate liability arising out of these matters and proceedings will not have a material adverse effect on its financial position, results of operations, or cash flows.

Road Home Contract

On June 10, 2016, the Office of Community Development (the “OCD”) of the State of Louisiana filed a written administrative demand with the Louisiana Commissioner of Administration against ICF Emergency Management Services, L.L.C. (“ICF Emergency”), a subsidiary of the Company, in connection with ICF Emergency’s administration of the Road Home Program (“Program”). The Program contract was a three-year, $912 million contract awarded to the Company in 2006. The Program ended, as scheduled, in 2009.

The Program was primarily intended to help homeowners and landlords of small rental properties affected by Hurricanes Rita and Katrina. In its administrative demand, the OCD sought approximately $200.8 million in alleged overpayments to the Program’s grant recipients, and separately supplemented the amount of recovery it sought in total to approximately $220.2 million. The State of Louisiana, through the Division of Administration, also filed suit in Louisiana state court on June 10, 2016. The State of Louisiana broadly alleges and sought recoupment for the same claim made in the administrative proceeding submission before the Louisiana Commissioner of Administration. On September 21, 2016, the Commissioner of the Division of Administration notified OCD and the Company of his decision to defer jurisdiction of the administrative demand filed by the OCD. In so doing, the Commissioner declined to reach a decision on the merits, stated that his deferral would not be deemed to grant or deny any portion of the OCD’s claim, and authorized the parties to proceed on the matter in the previously filed judicial proceeding. The Company continues to believe that this claim has no merit, intends to vigorously defend its position, and has therefore not recorded a liability as of March 31, 2020.

Basis of Presentation and Nature of Operations (Policies)	3 Months Ended
	Mar. 31, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements include the accounts of ICF International, Inc. and its subsidiaries (collectively, the “Company”), and have been prepared in accordance with United States (“U.S.”) generally accepted accounting principles (“U.S. GAAP”). All significant intercompany transactions and balances have been eliminated.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, and the reported amounts of revenue and expenses during the reporting periods. Areas of the consolidated financial statements where estimates may have the most significant effect include contractual and regulatory reserves, valuation and lives of tangible and intangible assets, contingent consideration related to business acquisitions, impairment of goodwill and long-lived assets, accrued liabilities, revenue recognition and costs to complete fixed-price contracts, bonus and other incentive compensation, stock-based compensation, reserves for tax benefits and valuation allowances on deferred tax assets, provisions for income taxes, collectability of receivables, and loss accruals for litigation. Actual results experienced by the Company may differ from management's estimates.
Reclassifications	Reclassifications As part of an amendment to the Credit Facility, as defined in Note 4 “Long-term Debt” below, the Company currently has both a term loan and a revolving debt facility within its Credit Facility. Previously, the unamortized debt issuance costs was included within Other assets in accordance with U.S. GAAP. The Company has reclassified unamortized debt issuance costs as of December 31, 2019 as Long-term debt for consistency of presentation.
Goodwill	Goodwill The Company tests for impairment, at a minimum, on an annual basis or earlier where certain events or changes in circumstances indicate that goodwill may more likely than not be impaired. As of March 31, 2020, the Company’s market capitalization based on its stock price was above its book value and has not fluctuated below book value subsequent to that date. The Company has experienced declines in the market price of its stock subsequent to the end of the first quarter as a result of the impact from the COVID-19 pandemic on the global economy. If there are significant decreases in its stock price for a sustained period or other unfavorable factors, the Company may be required to perform a goodwill impairment assessment, which may result in a recognition of goodwill impairment that could be material to the consolidated financial statements.
Long-Lived Assets	Long-Lived Assets The Company reviews its long-lived assets, including property and equipment and amortizable intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amounts of the assets may not be fully recoverable. If the total of the expected undiscounted future net cash flows is less than the carrying amount of the asset, a loss is recognized for any excess of the carrying amount over the fair value of the asset.
Leases	Leases The Company determines if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets and operating lease liabilities (current and non-current) on the consolidated balance sheets. Operating lease ROU assets and operating lease liabilities are recognized based on the present value of the future minimum lease payments as of the commencement date. Since most lease agreements do not provide an implicit rate, the Company uses its incremental borrowing rate as of the commencement date in estimating the present value of future payments. The operating lease ROU asset is based on the present value of future lease payments and excludes impacts from lease incentives and initial costs incurred to obtain the lease. Lease terms, for the purposes of determining each lease’s present value, include options to extend or terminate the lease if it is reasonably certain and economically reasonable that the Company will exercise that option. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term. The Company uses leases to obtain use of a variety of different resources, including those for the use of facilities or equipment. These agreements may contain both lease and non-lease components, which are generally accounted for separately. For equipment leases (including copier leases), the Company accounts for the lease component, as well as insignificant non-lease components, as a single lease.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recent Accounting Pronouncements Adopted Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2018-15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40). The standard aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is considered a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. The standard also requires the entity to expense the capitalized implementation costs of a hosting arrangement over the term of the hosting arrangement and present the expense related to the capitalized implementation costs in the same line item in the statement of income as the fees associated with the hosting arrangement. The Company adopted the standard in the first quarter of 2020 and the standard was implemented using the prospective method. The Company’s adoption of ASU 2018-15 did not have a material impact on the consolidated financial statements. Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued ASU 2016-13, Financial Instruments – Credit Losses (Topic 326) – Measurement of Credit Losses on Financial Instruments. The standard, as amended, requires companies to measure credit losses by using a methodology that reflects the expected credit losses based on historical information, current economic conditions, and reasonable and supportable information. The Company adopted the standard in the first quarter of 2020 utilizing a modified-retrospective transition approach that required a cumulative-effect adjustment of $0.5 million to the opening retained earnings in the consolidated statement of stockholders’ equity as of the date of the adoption. Recent Accounting Pronouncements Not Yet Adopted Reference Rate Reform In March 2020, FASB issued ASU 2020-04, Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The standard is intended to provide temporary optional expedients and exceptions to the U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. This guidance is effective beginning on March 12, 2020, and the Company may elect to apply the amendments prospectively through December 31, 2022. The Company is currently evaluating the impact this guidance may have on its consolidated financial statements.

Contract Receivables, Net (Tables)

3 Months Ended

Mar. 31, 2020

Receivables [Abstract]

Summary of Contract Receivables, Net

Contract receivables, net consisted of the following:

	March 31, 2020			December 31, 2019
Billed and billable	$	242,808		$	264,682
Allowance for doubtful accounts		(4,334	)		(3,506	)
Contract receivables, net	$	238,474		$	261,176

Goodwill (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill during the three-months period ended March 31, 2020 were as follows:

Balance as of December 31, 2019	$	719,934
Goodwill resulting from business combination - ITG		188,339
Effect of foreign currency translation		(3,096	)
Balance as of March 31, 2020	$	905,177

Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt

At March 31, 2020 and December 31, 2019, debt consisted of:

	March 31, 2020						December 31, 2019
	Average Interest Rate			Outstanding Balance			Average Interest Rate			Outstanding Balance
Term Loan				$	200,000					$	—
Revolving Credit					320,000						165,444
Total before debt issuance costs		3.05	%		520,000			3.59	%		165,444
Unamortized debt issuance costs					(3,021	)					(1,183	)
				$	516,979					$	164,261

Current portion of long-term debt				$	10,000					$	—
Long-term debt - non-current					506,979						164,261
				$	516,979					$	164,261

Schedule of Future Repayments of Debt Principal

Future repayments of debt principal are as follows:

			Payments due by March 31,
	2021		2022		2023		2024		2025		Thereafter		Total
Term Loan	$	10,000	$	10,000	$	10,000	$	15,000	$	155,000	$	—	$	200,000
Revolving Credit		—		—		—		—		320,000		—		320,000
Total	$	10,000	$	10,000	$	10,000	$	15,000	$	475,000	$	—	$	520,000

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21506-112644

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28551-108399

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21521-112644

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21538-112644

Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644

+ Details

Leases (Tables)

3 Months Ended

Mar. 31, 2020

Leases [Abstract]

Summary of Operating Leases

Operating leases consisted of the following at March 31, 2020 and December 31, 2019:

	March 31, 2020			December 31, 2019
Real estate facilities	$	178,227		$	165,752
Office equipment		2,269			1,631
Other		863			892
		181,359			168,275
Amortization of right-of-use assets		(36,015	)		(34,310	)
Total operating lease right-of-use assets	$	145,344		$	133,965

Summary of Rent Expense

Rent expense is recognized on a straight-line basis over the lease term. Rent expense consists of the following:

	Three Months Ended
	March 31, 2020		March 31, 2019
Operating lease costs	$	9,326	$	8,896
Short-term lease costs		431		681
Variable lease costs		1		4
Total rent expense	$	9,758	$	9,581

Summary of Future Minimum Lease Payments Under Non-Cancellable Leases

Future minimum lease payments under non-cancellable leases as of March 31, 2020 were as follows:

March 31, 2021	$	39,815
March 31, 2022		39,877
March 31, 2023		33,163
March 30, 2024		20,008
March 30, 2025		22,838
Thereafter		193,009
Total future minimum lease payments		348,710
Less: Interest		(186,387	)
Total operating lease liabilities	$	162,323

Operating lease liabilities - current	$	33,333
Operating lease liabilities - non-current		128,990
Total operating lease liabilities	$	162,323

Summary of Other Information Related to Operating Leases

Other information related to operating leases is as follows:

	March 31, 2020			March 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	9,526		$	9,389
Right-of-use assets obtained in exchange for new operating lease liabilities	$	21,098		$	2,159
Weighted-average remaining lease term - operating leases		6.0			5.1
Weighted-average discount rate - operating leases		3.6	%		3.8	%

Other Comprehensive (Loss) Income and Accumulated Other Comprehensive Loss (Tables)

3 Months Ended

Mar. 31, 2020

Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]

Components of Other Comprehensive Income and Components of Accumulated Other Comprehensive Loss

	Three Months Ended March 31, 2020
	Foreign Currency Translation Adjustments			Gain on Sale of Interest Rate Hedge Agreement ⁽¹⁾			Change in Fair Value of Interest Rate Hedge Agreements ⁽²⁾			Total
Accumulated other comprehensive (loss) income at December 31, 2019	$	(10,995	)	$	1,634		$	(2,783	)	$	(12,144	)
Current period other comprehensive (loss) income:
Other comprehensive loss before reclassifications		(5,430	)		—			(8,601	)		(14,031	)
Amounts reclassified from accumulated other comprehensive income ⁽⁴⁾		—			(180	)		230			50
Effect of taxes⁽³⁾		612			47			2,199			2,858
Total current period other comprehensive (loss) income		(4,818	)		(133	)		(6,172	)		(11,123	)
Accumulated other comprehensive (loss) income at March 31, 2020	$	(15,813	)	$	1,501		$	(8,955	)	$	(23,267	)

	Three Months Ended March 31, 2019
	Foreign Currency Translation Adjustments			Gain on Sale of Interest Rate Hedge Agreement ⁽¹⁾			Change in Fair Value of Interest Rate Hedge Agreement ⁽²⁾			Total
Accumulated other comprehensive (loss) income at December 31, 2018	$	(14,168	)	$	2,164		$	(547	)	$	(12,551	)
Current period other comprehensive (loss) income:
Other comprehensive (loss) income before reclassifications ⁽⁴⁾		1,254			—			(1,164	)		90
Amounts reclassified from accumulated other comprehensive income		—			(180	)		23			(157	)
Effect of taxes⁽³⁾		—			47			303			350
Total current period other comprehensive (loss) income		1,254			(133	)		(838	)		283
Accumulated other comprehensive (loss) income at March 31, 2019	$	(12,914	)	$	2,031		$	(1,385	)	$	(12,268	)

(1)

(2)

(3)	The Company’s effective tax rate for the three months ended March 31, 2020 and 2019 was 18.3% and 19.5%, respectively.

(4)	The Company expects to reclassify $0.7 million net gains related to the Gain on Sale of Interest Rate Hedge Agreement and $2.5 million net losses related to the Change in Fair Value of Interest Rate Hedge Agreement from accumulated other comprehensive loss into earnings during the next 12 months.

Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2020

Stockholders Equity Note [Abstract]

Schedule of Changes in Stockholders' Equity

Changes in stockholders’ equity for the three months ended March 31, 2020 and 2019 are as follows:

	Three Months Ended March 31, 2020
	Common Stock					Additional Paid-in		Retained			Treasury Stock					Accumulated Other Comprehensive
	Shares			Amount		Capital		Earnings			Shares		Amount			Loss			Total
Balance at December 31, 2019		18,868		$	23	$	346,795	$	544,840			3,978	$	(164,963	)	$	(12,144	)	$	714,551
Net income		—			—		—		10,612			—		—			—			10,612
Other comprehensive income		—			—		—		—			—		—			(11,123	)		(11,123	)
Equity compensation		—			—		3,826		—			—		—			—			3,826
Exercise of stock options		1			—		37		—			—		—			—			37
Issuance of shares pursuant to vesting of restricted stock units		269			—		—		—			—		—			—			—
Net payments for stock issuances and buybacks		(311	)		—		—		—			311		(23,998	)		—			(23,998	)
Cumulative-effect adjustment for adoption of accounting principle		—			—		—		(513	)		—		—			—			(513	)
Dividends declared		—			—		—		(2,636	)		—		—			—			(2,636	)
Balance at March 31, 2020		18,827		$	23	$	350,658	$	552,303			4,289	$	(188,961	)	$	(23,267	)	$	690,756

	Three Months Ended March 31, 2019
	Common Stock					Additional Paid-in		Retained			Treasury Stock					Accumulated Other Comprehensive
	Shares			Amount		Capital		Earnings			Shares		Amount			Loss			Total
Balance at December 31, 2018		18,817		$	22	$	326,208	$	486,442			3,629	$	(139,704	)	$	(12,551	)	$	660,417
Net income		—			—		—		15,318			—		—			—			15,318
Other comprehensive loss		—			—		—		—			—		—			283			283
Equity compensation		—			—		4,151		—			—		—			—			4,151
Exercise of stock options		11			—		404		—			—		—			—			404
Issuance of shares pursuant to vesting of restricted stock units		255			1		—		—			—		—			—			1
Net payments for stock issuances and buybacks		(217	)		—		—		—			217		(15,369	)		—			(15,369	)
Dividends declared		—			—		—		(2,634	)		—		—			—			(2,634	)
Balance at March 31, 2019		18,866		$	23	$	330,763	$	499,126			3,846	$	(155,073	)	$	(12,268	)	$	662,571

Restricted Cash (Tables)

3 Months Ended

Mar. 31, 2020

Restricted Cash And Cash Equivalents Current [Abstract]

Reconciliation of Cash and Cash Equivalents, and Restricted Cash

	2020				2019
	Beginning		Ending		Beginning		Ending
Cash and cash equivalents	$	6,482	$	58,661	$	11,694	$	5,689
Restricted cash - non-current		—		—		1,292		—
Total of cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$	6,482	$	58,661	$	12,986	$	5,689

Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2020

Revenue From Contract With Customer [Abstract]

Disaggregation of Revenue

	Three Months Ended March 31,
	2020					2019
	Dollars		Percent			Dollars		Percent
Client Markets:
Energy, environment, and infrastructure	$	151,362		42	%	$	153,403		45	%
Health, education, and social programs		143,423		40	%		121,423		35	%
Safety and security		31,585		9	%		29,551		9	%
Consumer and financial services		31,868		9	%		36,877		11	%
Total	$	358,238		100	%	$	341,254		100	%

	Three Months Ended
	March 31, 2020					March 31, 2019
	Dollars		Percent			Dollars		Percent
Client Type:
U.S. federal government	$	155,375		44	%	$	132,092		39	%
U.S. state and local government		61,330		17	%		65,950		19	%
International government		23,092		6	%		27,135		8	%
Total Government		239,797		67	%		225,177		66	%
Commercial		118,441		33	%		116,077		34	%
Total	$	358,238		100	%	$	341,254		100	%

	Three Months Ended
	March 31, 2020					March 31, 2019
	Dollars		Percent			Dollars		Percent
Contract Mix:
Time-and-materials	$	168,213		47	%	$	155,182		45	%
Fixed price		133,128		37	%		134,448		40	%
Cost-based		56,896		16	%		51,624		15	%
Total	$	358,238		100	%	$	341,254		100	%

Schedule of Contract Balances and Changes in Contract Balances

Contract Balances:

	March 31, 2020			December 31, 2019			$ Change		% Change
Contract assets	$	151,558		$	142,337		$	9,221		6.5	%
Contract liabilities		(29,318	)		(37,413	)		8,095		(21.6	%)
Net contract assets (liabilities)	$	122,240		$	104,924		$	17,316		16.5	%

Derivative instruments and Hedges Activities (Tables)

3 Months Ended

Mar. 31, 2020

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Summary of Interest Rate Swaps Derivatives Designated as Cash Flow Hedges

A summary of interest rate swap derivatives designated as cash flow hedges as of March 31, 2020 are as follows:

				Dates of Effected Cash Flows
Date of Interest Rate Swap Agreement	Notional Amount ($million)		Paid Fixed Interest Rate%	Beginning	Ending
September 30, 2016 ⁽¹⁾	$	100.0	-	January 31, 2018	January 31, 2023
August 31, 2017	$	25.0	1.8475%	August 31, 2018	August 31, 2023
August 8, 2018	$	50.0	2.8540%	August 31, 2018	August 31, 2023
August 8, 2018	$	25.0	2.8510%	August 31, 2018	August 31, 2023
February 20, 2020	$	100.0	1.2940%	February 28, 2020	February 28, 2025

(1)

Fair Value (Tables)

3 Months Ended

Mar. 31, 2020

Fair Value Disclosures [Abstract]

Schedule of Financial Instruments Measured at Fair Value on Recurring Basis

Financial instruments measured at fair value on a recurring basis and their location within the accompanying consolidated balance sheets are as follows:

	March 31, 2020
(in thousands)	Level 1		Level 2		Level 3		Total		Location on Balance Sheet
Assets:
Forward contract agreements	$	—	$	233	$	—	$	233	Prepaid expenses and other assets
Deferred compensation investments in cash surrender life insurance		—		12,707		—		12,707	Other assets
Total	$	—	$	12,940	$	—	$	12,940

Liabilities:
Deferred compensation plan liabilities	$	—	$	12,294	$	—	$	12,294	Other long-term liabilities
Interest rate swaps		—		12,183		—		12,183	Other long-term liabilities
Total	$	—	$	24,477	$	—	$	24,477

	December 31, 2019
(in thousands)	Level 1		Level 2		Level 3		Total		Location on Balance Sheet
Assets:
Forward contract agreements	$	—	$	733	$	—	$	733	Prepaid expenses and other assets
Deferred compensation investments in cash surrender life insurance				15,020				15,020	Other assets
Total	$	—	$	15,753	$	—	$	15,753

Liabilities:
Deferred compensation plan liabilities	$	—	$	14,855	$	—	$	14,855	Other long-term liabilities
Interest rate swaps		—		3,811		—		3,811	Other long-term liabilities
Total	$	—	$	18,666	$	—	$	18,666

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details

Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Schedule of Dilutive Effect of Stock Options RSUs and PSAs

The dilutive effect of stock options, RSUs, and PSAs for each period reported is summarized below:

	Three Months Ended
	March 31,
	2020		2019
Net Income	$	10,612	$	15,318

Weighted-average number of basic shares outstanding during the period		18,840		18,825
Dilutive effect of stock options, RSUs, and performance shares		357		438
Weighted-average number of diluted shares outstanding during the period		19,197		19,263

Basic earnings per share	$	0.56	$	0.81
Diluted earnings per share	$	0.55	$	0.80

Basis of Presentation and Nature of Operations - Additional Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) Office Segment
Basis of Presentation and Nature of Operations [Line Items]
Number of operating segments \| Segment	1
Number of reporting segments \| Segment	1
Cumulative-effect adjustment to the opening retained earnings \| $	$ (513)
ASU 2016-13
Basis of Presentation and Nature of Operations [Line Items]
Cumulative-effect adjustment to the opening retained earnings \| $	$ 500
Domestic \| Minimum
Basis of Presentation and Nature of Operations [Line Items]
Number of offices \| Office	75
International
Basis of Presentation and Nature of Operations [Line Items]
Number of offices \| Office	15

Contract Receivables, Net - Summary of Contract Receivables, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Receivables [Abstract]
Billed and billable	$ 242,808	$ 264,682
Allowance for doubtful accounts	(4,334)	(3,506)
Contract receivables, net	$ 238,474	$ 261,176

Goodwill - Schedule of Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 31, 2020	Mar. 31, 2020
Goodwill [Line Items]
Balance as of December 31, 2019		$ 719,934
Effect of foreign currency translation		(3,096)
Balance as of March 31, 2020		905,177
ITG
Goodwill [Line Items]
Goodwill resulting from business combinations	$ 188,300	$ 188,339

Long-Term Debt - Schedule of Long Term Debt (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Average Interest Rate	3.05%	3.59%
Outstanding Balance before debt issuance costs	$ 520,000	$ 165,444
Unamortized debt issuance costs	3,021	1,183
Long-term Debt	516,979	164,261
Current portion of long-term debt	10,000
Long-term debt	506,979	164,261
Term Loan
Debt Instrument [Line Items]
Outstanding Balance before debt issuance costs	200,000
Revolving Credit
Debt Instrument [Line Items]
Outstanding Balance before debt issuance costs	$ 320,000	$ 165,444

Long-Term Debt - Additional Information (Details)		3 Months Ended
Long-Term Debt - Additional Information (Details)	Mar. 03, 2020 USD ($) Bank	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Credit facility syndication, number of commercial banks \| Bank	10
Line of credit facility, expiration date		Mar. 03, 2025
Line of credit facility, swing line commitment amount	$ 25,000,000.0
Line of credit facility, maximum borrowing capacity	60,000,000.0
Line of credit facility, additional revolving credit commitments under existing loan facility	$ 300,000,000.0
Line of credit facility, interest coverage ratio covenant	300.00%
Line of credit facility, leverage ratio covenant	400.00%
Line of credit facility, leverage ratio covenant step-up pursuant to permitted acquisitions	425.00%
Long-term debt outstanding exclusive of unamortized debt issuance costs		$ 520,000,000	$ 165,444,000
Letters of credit outstanding, amount		2,900,000
Derivative obligation, net		9,900,000
Line of credit facility, remaining borrowing capacity		277,100,000
Line of credit facility, current borrowing capacity		$ 125,600,000
Federal Funds Open Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
Revolving Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600,000,000.0
Term Loan
Debt Instrument [Line Items]
Debt instrument, principal amount	200,000,000.0
Line of credit facility	200,000,000.0
Swing Line Loans
Debt Instrument [Line Items]
Line of credit facility	75,000,000.0
Maximum
Debt Instrument [Line Items]
Line of credit facility, swing line commitment amount	$ 75,000,000.0
Line of credit facility, commitment fee unused capacity	0.25%
Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%
Minimum
Debt Instrument [Line Items]
Line of credit facility, commitment fee unused capacity	0.13%
Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%

Long Term Debt - Schedule of Future Repayment of Principal Debt (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
2021	$ 10,000
2022	10,000
2023	10,000
2024	15,000
2025	475,000
Total	520,000	$ 165,444
Term Loan
Debt Instrument [Line Items]
2021	10,000
2022	10,000
2023	10,000
2024	15,000
2025	155,000
Total	200,000
Revolving Credit
Debt Instrument [Line Items]
2025	320,000
Total	$ 320,000	$ 165,444

Leases - Additional Information (Details) $ in Millions	3 Months Ended
Leases - Additional Information (Details) $ in Millions	Mar. 31, 2020 USD ($)
Lessee Lease Description [Line Items]
Operating leases, option to extend lease	The leases may include options to extend the lease periods for up to 5 years
Operating leases, existence of option to extend	true
Operating leases, option to terminate lease	options to terminate the leases within 1 year
Operating leases, existence of option to terminate	true
Operating leases, residual value guarantee description	The leases may include a residual value guarantee or a responsibility to return the property to its original state of use.
Operating leases, existence of residual value guarantee	true
Additional operating leases not yet commenced, value	$ 129.8
Operating leases not yet possessed and commenced, lease term	3 years
Minimum
Lessee Lease Description [Line Items]
Operating leases, remaining lease term	1 year
Additional operating leases not yet commenced, lease terms	5 years
Maximum
Lessee Lease Description [Line Items]
Operating leases, remaining lease term	14 years
Operating leases, extendable lease term	5 years
Operating leases, termination lease term	1 year
Additional operating leases not yet commenced, lease terms	17 years

Leases - Summary of Operating Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 181,359	$ 168,275
Amortization of right-of-use assets	(36,015)	(34,310)
Total operating lease right-of-use assets	145,344	133,965
Real Estate Facilities
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	178,227	165,752
Office Equipment
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	2,269	1,631
Other
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 863	$ 892

Leases - Summary of Rent Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease costs	$ 9,326	$ 8,896
Short-term lease costs	431	681
Variable lease costs	1	4
Total rent expense	$ 9,758	$ 9,581

Leases - Summary of Future Minimum Lease Payments Under Non-Cancellable Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
March 31, 2021	$ 39,815
March 31, 2022	39,877
March 31, 2023	33,163
March 30, 2024	20,008
March 30, 2025	22,838
Thereafter	193,009
Total future minimum lease payments	348,710
Less: Interest	(186,387)
Total operating lease liabilities	162,323
Operating lease liabilities - current	33,333	$ 32,500
Operating lease liabilities - non-current	128,990	$ 119,250
Total operating lease liabilities	$ 162,323

Leases - Summary of Other Information Related to Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating cash flows from operating leases	$ 9,526	$ 9,389
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 21,098	$ 2,159
Weighted-average remaining lease term - operating leases	6 years	5 years 1 month 6 days
Weighted-average discount rate - operating leases	3.60%	3.80%

Other Comprehensive (Loss) Income and Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands

3 Months Ended

Mar. 31, 2020

Mar. 31, 2019

Accumulated Other Comprehensive Income Loss [Line Items]

Balance

$ 714,551

$ 660,417

Current period other comprehensive (loss) income:

Total current period other comprehensive (loss) income

(11,123)

283

Balance

690,756

662,571

Foreign Currency Translation Adjustments

Accumulated Other Comprehensive Income Loss [Line Items]

Balance

(10,995)

(14,168)

Current period other comprehensive (loss) income:

Other comprehensive income (loss) before reclassifications

(5,430)

1,254

^[1]

Amounts reclassified from accumulated other comprehensive (loss) income

^[1]

Effect of taxes

^[2]

612

Total current period other comprehensive (loss) income

(4,818)

1,254

Balance

(15,813)

(12,914)

Gain on Sale of Interest Rate Hedge Agreement

Accumulated Other Comprehensive Income Loss [Line Items]

Balance

^[3]

1,634

2,164

Current period other comprehensive (loss) income:

Other comprehensive income (loss) before reclassifications

^[3]

Amounts reclassified from accumulated other comprehensive (loss) income

^[3]

(180)

^[1]

(180)

Effect of taxes

^[2],[3]

Total current period other comprehensive (loss) income

^[3]

(133)

Balance

^[3]

1,501

2,031

Change in Fair Value of Interest Rate Hedge Agreements

Accumulated Other Comprehensive Income Loss [Line Items]

Balance

^[4]

(2,783)

(547)

Current period other comprehensive (loss) income:

Other comprehensive income (loss) before reclassifications

^[4]

(8,601)

(1,164)

^[1]

Amounts reclassified from accumulated other comprehensive (loss) income

^[4]

230

^[1]

Effect of taxes

^[2],[4]

2,199

303

Total current period other comprehensive (loss) income

^[4]

(6,172)

(838)

Balance

^[4]

(8,955)

(1,385)

Accumulated Other Comprehensive Loss

Accumulated Other Comprehensive Income Loss [Line Items]

Balance

(12,144)

(12,551)

Current period other comprehensive (loss) income:

Other comprehensive income (loss) before reclassifications

(14,031)

^[1]

Amounts reclassified from accumulated other comprehensive (loss) income

^[1]

(157)

Effect of taxes

^[2]

2,858

350

Total current period other comprehensive (loss) income

(11,123)

283

Balance

$ (23,267)

$ (12,268)

[1]	The Company expects to reclassify $0.7 million net gains related to the Gain on Sale of Interest Rate Hedge Agreement and $2.5 million net losses related to the Change in Fair Value of Interest Rate Hedge Agreement from accumulated other comprehensive loss into earnings during the next 12 months
[2]	The Company’s effective tax rate for the three months ended March 31, 2020 and 2019 was 18.3% and 19.5%, respectively.
[3]	Represents the unamortized value of an interest rate hedge agreement, designated as a cash flow hedge, which was sold on December 1, 2016. The fair value of the interest rate hedge agreement, at the date of the sale, was recorded in other comprehensive income, net of tax, and is being reclassified to interest expense when earnings are impacted by the hedged items and as interest payments are made on the Credit Facility from January 31, 2018 to January 31, 2023 (see Note 10—Derivative Instruments and Hedging Activities).
[4]	Represents the change in fair value of interest rate hedge agreements designated as a cash flow hedge. The fair value of the interest rate hedge agreements was recorded in other comprehensive income and will be reclassified to interest expense when earnings are impacted by the hedged items and as interest payments are made on the Credit Facility from August 31, 2018 to February 28, 2025 (see Note 10—Derivative Instruments and Hedging Activities).

Other Comprehensive (Loss) Income and Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Effective tax rate	18.30%	19.50%
Expects to reclassify net gains from accumulated other comprehensive loss into earnings	$ 0.7
Expects to reclassify net losses related to change in fair value of interest rate hedge agreement from accumulated other comprehensive loss into earnings	$ 2.5

Stockholders' Equity - Schedule of Changes in Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Balance	$ 714,551	$ 660,417
Net income	10,612	15,318
Other comprehensive income (loss)	(11,123)	283
Equity compensation	3,826	4,151
Exercise of stock options	37	404
Issuance of shares pursuant to vesting of restricted stock units		1
Net payments for stock issuances and buybacks	(23,998)	(15,369)
Cumulative-effect adjustment for adoption of accounting principle	(513)
Dividends declared	(2,636)	(2,634)
Balance	690,756	662,571
Common Stock
Balance	$ 23	$ 22
Balance (in shares)	18,868	18,817
Exercise of stock options (in shares)	1	11
Issuance of shares pursuant to vesting of restricted stock units		$ 1
Issuance of shares pursuant to vesting of restricted stock units (in shares)	269	255
Net payments for stock issuances and buybacks (in shares)	(311)	(217)
Balance	$ 23	$ 23
Balance (in shares)	18,827	18,866
Additional Paid-in Capital
Balance	$ 346,795	$ 326,208
Equity compensation	3,826	4,151
Exercise of stock options	37	404
Balance	350,658	330,763
Retained Earnings
Balance	544,840	486,442
Net income	10,612	15,318
Cumulative-effect adjustment for adoption of accounting principle	(513)
Dividends declared	(2,636)	(2,634)
Balance	552,303	499,126
Treasury Stock
Balance	$ (164,963)	$ (139,704)
Balance (in shares)	3,978	3,629
Net payments for stock issuances and buybacks	$ (23,998)	$ (15,369)
Net payments for stock issuances and buybacks (in shares)	311	217
Balance	$ (188,961)	$ (155,073)
Balance (in shares)	4,289	3,846
Accumulated Other Comprehensive Loss
Balance	$ (12,144)	$ (12,551)
Other comprehensive income (loss)	(11,123)	283
Balance	$ (23,267)	$ (12,268)

Restricted Cash - Reconciliation of Cash and Cash Equivalents, and Restricted Cash to the Total of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 58,661	$ 6,482	$ 5,689	$ 11,694
Restricted cash - non-current				1,292
Total of cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$ 58,661	$ 6,482	$ 5,689	$ 12,986

Revenue Recognition - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 358,238	$ 341,254
Fixed-Price
Disaggregation Of Revenue [Line Items]
Revenue from clients	133,128	134,448
Time-and-Materials
Disaggregation Of Revenue [Line Items]
Revenue from clients	168,213	155,182
Cost-Based
Disaggregation Of Revenue [Line Items]
Revenue from clients	56,896	51,624
U.S. Federal Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	155,375	132,092
U.S. State and Local Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	61,330	65,950
International Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	23,092	27,135
Total Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	239,797	225,177
Commercial
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 118,441	$ 116,077
Customer Concentration Risk \| Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	100.00%	100.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| Fixed-Price
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	37.00%	40.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| Time-and-Materials
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	47.00%	45.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| Cost-Based
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	16.00%	15.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| U.S. Federal Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	44.00%	39.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| U.S. State and Local Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	17.00%	19.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| International Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	6.00%	8.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| Total Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	67.00%	66.00%
Customer Concentration Risk \| Revenue from Contract with Customer \| Commercial
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	33.00%	34.00%
Energy Environmental And Infrastructure
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 151,362	$ 153,403
Energy Environmental And Infrastructure \| Customer Concentration Risk \| Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	42.00%	45.00%
Health Education And Social Programs
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 143,423	$ 121,423
Health Education And Social Programs \| Customer Concentration Risk \| Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	40.00%	35.00%
Safety And Security
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 31,585	$ 29,551
Safety And Security \| Customer Concentration Risk \| Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	9.00%	9.00%
Consumer And Financial Services
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 31,868	$ 36,877
Consumer And Financial Services \| Customer Concentration Risk \| Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	9.00%	11.00%

Revenue Recognition - Additional Information (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Revenue From Contract With Customer [Abstract]
Net contract assets (liabilities)	$ 17,316

Revenue Recognition - Schedule of Changes in Contract Balances Due to Adoption of New Accounting Standards (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Revenue From Contract With Customer [Abstract]
Contract assets	$ 151,558	$ 142,337
Contract liabilities	(29,318)	(37,413)
Net contract assets (liabilities)	122,240	$ 104,924
Change in contract assets	9,221
Change in contract liabilities	8,095
Change in net contract assets (liabilities)	$ 17,316
Percentage of change in contract assets	6.50%
Percentage of change in contract liabilities	(21.60%)
Percentage of change in net contract assets (liabilities)	16.50%

Revenue Recognition - Additional Information (Detail1) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-04-01 $ in Billions	Mar. 31, 2020 USD ($)
Revenue From Contract With Customer [Line Items]
Unfulfilled performance obligation	$ 1.5
Minimum
Revenue From Contract With Customer [Line Items]
Expected period to satisfy performance obligations	1 year
Maximum
Revenue From Contract With Customer [Line Items]
Expected period to satisfy performance obligations	2 years

Derivative Instruments and Hedging Activities - Additional Information (Details) - Interest Rate Swap - Cash Flow Hedging - Designated as Hedging Instrument - USD ($)

Feb. 20, 2020

Aug. 08, 2018

Aug. 31, 2017

Sep. 30, 2016

^[1]

Derivative [Line Items]

Aggregate notional amount

$ 100,000,000.0

$ 50,000,000.0

$ 25,000,000.0

$ 100,000,000.0

Derivative, fixed interest rate

1.294%

2.854%

1.8475%

Beginning dates of effected cash flows

Feb. 28, 2020

Aug. 31, 2018

Jan. 31, 2018

Ending dates of effected cash flows

Feb. 28, 2025

Aug. 31, 2023

Jan. 31, 2023

[1]

Derivative Instruments and Hedging Activities - Summary of Interest Rate Swaps Derivatives Designated as Cash Flow Hedges (Details) - Cash Flow Hedging - Designated as Hedging Instrument - USD ($)

Feb. 20, 2020

Aug. 08, 2018

Aug. 31, 2017

Sep. 30, 2016

^[1]

Interest Rate Swap

Derivative [Line Items]

Notional Amount

$ 100,000,000.0

$ 50,000,000.0

$ 25,000,000.0

$ 100,000,000.0

Paid Fixed Interest Rate%

1.294%

2.854%

1.8475%

Beginning Dates of Effected Cash Flows

Feb. 28, 2020

Aug. 31, 2018

Jan. 31, 2018

Ending Dates of Effected Cash Flows

Feb. 28, 2025

Aug. 31, 2023

Jan. 31, 2023

Interest Rate Swap 2.8510% Paid Rate

Derivative [Line Items]

Notional Amount

$ 25,000,000.0

Paid Fixed Interest Rate%

2.851%

Beginning Dates of Effected Cash Flows

Aug. 31, 2018

Ending Dates of Effected Cash Flows

Aug. 31, 2023

[1]

Income Taxes - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Taxes [Line Items]
Effective income tax rate reconciliation, percent	18.30%	19.50%
Unrecognized tax positions	$ 0
Unrecognized tax benefits that would impact effective tax rate	$ 0
Internal Revenue Service (IRS) \| Earliest Tax Year
Income Taxes [Line Items]
Open tax year	2016
Internal Revenue Service (IRS) \| Latest Tax Year
Income Taxes [Line Items]
Open tax year	2018
State Local and Foreign Jurisdictions \| Earliest Tax Year
Income Taxes [Line Items]
Open tax year	2015
State Local and Foreign Jurisdictions \| Latest Tax Year
Income Taxes [Line Items]
Open tax year	2018

Accounting for Stock Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Apr. 04, 2018	Mar. 31, 2020	Mar. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated share-based compensation expense		$ 5.1	$ 6.7
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period		164,468
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value		$ 57.76
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized		$ 20.6
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition		2 years 4 months 28 days
Cash Settled RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period		110,895
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value		$ 57.76
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized		$ 11.7
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition		2 years 1 month 6 days
Performance Shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period		55,264
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value		$ 58.76
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized		$ 6.5
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition		1 year 9 months 18 days
Omnibus Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares grants	1,185,000	109,832
Share-based compensation arrangement by share-based payment award, number of additional awards		0
Share-based compensation arrangement by share-based payment award, number of shares available for grant		669,643

Fair Value - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Assets:
Assets, Total	$ 12,940	$ 15,753
Liabilities:
Liabilities, Total	24,477	18,666
Level 2
Assets:
Assets, Total	12,940	15,753
Liabilities:
Liabilities, Total	24,477	18,666
Forward Contract Agreements \| Prepaid Expenses and Other Assets
Assets:
Assets, Total	233	733
Forward Contract Agreements \| Level 2 \| Prepaid Expenses and Other Assets
Assets:
Assets, Total	233	733
Deferred Compensation Investments in Cash Surrender Life Insurance \| Other Assets
Assets:
Assets, Total	12,707	15,020
Deferred Compensation Investments in Cash Surrender Life Insurance \| Level 2 \| Other Assets
Assets:
Assets, Total	12,707	15,020
Deferred Compensation Plan Liabilities \| Other Long-Term Liabilities
Liabilities:
Liabilities, Total	12,294	14,855
Deferred Compensation Plan Liabilities \| Level 2 \| Other Long-Term Liabilities
Liabilities:
Liabilities, Total	12,294	14,855
Interest Rate Swap \| Other Long-Term Liabilities
Liabilities:
Liabilities, Total	12,183	3,811
Interest Rate Swap \| Level 2 \| Other Long-Term Liabilities
Liabilities:
Liabilities, Total	$ 12,183	$ 3,811

Business Combinations - Additional Information (Details) - ITG - USD ($) $ in Thousands		3 Months Ended
	Jan. 31, 2020	Dec. 31, 2022	Jun. 30, 2020	Mar. 31, 2020
Business Acquisition [Line Items]
Business acquisition date	Jan. 31, 2020
Purchase price acquisition	$ 255,000
Purchase price allocated to intangibles	235,600
Goodwill resulting from business combinations	$ 188,300			$ 188,339
Amortization of goodwill and other intangibles amortized for income tax purpose period	15 years
Warrant
Business Acquisition [Line Items]
Percentage of fair value acquisition discounting liabilities	3.00%
Warrant \| Forecast
Business Acquisition [Line Items]
Purchase price acquisition			$ 1,900
Indemnity
Business Acquisition [Line Items]
Percentage of fair value acquisition discounting liabilities	3.25%
Indemnity \| Forecast
Business Acquisition [Line Items]
Purchase price acquisition		$ 1,200
Other Intangible Assets
Business Acquisition [Line Items]
Purchase price allocated to intangibles	$ 47,300
Weighted average amortization period	5 years 8 months 12 days
Customer-related Intangibles
Business Acquisition [Line Items]
Purchase price allocated to intangibles	$ 46,400
Weighted average amortization period	6 years 10 months 24 days
Marketing-related Intangibles
Business Acquisition [Line Items]
Purchase price allocated to intangibles	$ 900
Weighted average amortization period	10 months 24 days

Earnings Per Share - Additional Information (Details) - shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Antidilutive securities excluded from computation of earnings per share, amount	0	31,840
Performance Shares \| Initial Performance Vesting Period
Share-based compensation arrangement by share-based payment award, award vesting period	2 years

Earnings Per Share - Schedule of Dilutive Effect of Stock Options RSUs and PSAs (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share [Abstract]
Net Income	$ 10,612	$ 15,318
Weighted-average number of basic shares outstanding during the period	18,840	18,825
Dilutive effect of stock options, RSUs, and performance shares	357	438
Weighted-average number of diluted shares outstanding during the period	19,197	19,263
Basic earnings per share	$ 0.56	$ 0.81
Diluted earnings per share	$ 0.55	$ 0.80

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(19))
-URI http://asc.fasb.org/extlink&oid=116637232&loc=SL114874131-224263

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1337-109256

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=117327953&loc=d3e4984-109258

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(21))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22694-107794

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1252-109256

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(23))
-URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References

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+ Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Share Repurchase Program - Additional Information (Details)	Mar. 31, 2020 USD ($)
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, authorized amount	$ 100,000,000.0
Line of credit facility, condition permitted for unlimited share repurchases, leverage ratio	3.50
Credit Facility
Equity Class Of Treasury Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount	$ 9,400,000

Subsequent Events - Additional Information (Details) - Subsequent Event	May 05, 2020 $ / shares
Subsequent Event [Line Items]
Dividend declaration date	May 05, 2020
Cash dividend per share	$ 0.14
Dividend payment date	Jul. 14, 2020
Dividend record date	Jun. 12, 2020

Contingencies - Additional Information (Details) - USD ($) $ in Millions	Jun. 10, 2016	Mar. 31, 2020
Loss Contingencies [Line Items]
Community development related to claim		$ 220.2
OCD vs ICF Emergency
Loss Contingencies [Line Items]
Loss contingency damages sought value	$ 200.8
Road Home Contract
Loss Contingencies [Line Items]
Contract term, period	3 years
Contract award, value	$ 912.0