ICF International (ICFI) 10-Q 2 Aug 19 2019 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Jul. 26, 2019
Document And Entity Information [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 (in shares)		18,789,454
Document Type	10-Q
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity File Number	001-33045
Entity Tax Identification Number	223661438
Entity Incorporation State Country Code	Delaware
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

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 6,304	$ 11,694
Contract receivables, net	276,982	230,966
Contract assets	141,960	126,688
Prepaid expenses and other assets	16,733	16,253
Income tax receivable	12,194	6,505
Total Current Assets	454,173	392,106
Property and Equipment, net	54,455	48,105
Other Assets:
Restricted cash - non-current		1,292
Goodwill	719,117	715,644
Other intangible assets, net	29,548	35,494
Operating lease - right-of-use assets	132,715
Other assets	23,762	21,221
Total Assets	1,413,770	1,213,862
Current Liabilities:
Accounts payable	95,068	102,599
Contract liabilities	33,435	33,494
Operating lease liabilities - current	29,238
Accrued salaries and benefits	47,636	44,103
Accrued subcontractors and other direct costs	41,275	58,791
Accrued expenses and other current liabilities	27,311	39,072
Total Current Liabilities	273,963	278,059
Long-term Liabilities:
Long-term debt	288,544	200,424
Operating lease liabilities - non-current	116,940
Deferred rent		13,938
Deferred income taxes	42,079	40,165
Other long-term liabilities	25,607	20,859
Total Liabilities	747,133	553,445
Contingencies (Note 15)
Stockholders’ Equity:
Preferred stock, par value $.001; 5,000,000 shares authorized; none issued
Common stock, par value $.001; 70,000,000 shares authorized; 22,722,494 and 22,445,576 shares issued as of June 30, 2019 and December 31, 2018, respectively; 18,758,986 and 18,817,495 shares outstanding as of June 30, 2019 and December 31, 2018, respectively	23	22
Additional paid-in capital	335,345	326,208
Retained earnings	511,095	486,442
Treasury stock	(164,705)	(139,704)
Accumulated other comprehensive loss	(15,121)	(12,551)
Total Stockholders’ Equity	666,637	660,417
Total Liabilities and Stockholders’ Equity	$ 1,413,770	$ 1,213,862

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2019	Dec. 31, 2018
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)	22,722,494	22,445,576
Common stock, outstanding (in shares)	18,758,986	18,817,495

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Revenue	$ 366,717,000	$ 324,315,000	$ 707,971,000	$ 627,095,000
Direct costs	235,053,000	206,565,000	451,002,000	395,391,000
Operating costs and expenses:
Indirect and selling expenses	101,450,000	90,410,000	197,969,000	180,069,000
Depreciation and amortization	5,595,000	4,045,000	10,357,000	8,514,000
Amortization of intangible assets	2,077,000	2,270,000	4,212,000	4,514,000
Total operating costs and expenses	109,122,000	96,725,000	212,538,000	193,097,000
Operating income	22,542,000	21,025,000	44,431,000	38,607,000
Interest expense	(2,934,000)	(2,167,000)	(5,387,000)	(3,833,000)
Other income (expense)	186,000	(318,000)	(226,000)	(214,000)
Income before income taxes	19,794,000	18,540,000	38,818,000	34,560,000
Provision for income taxes	5,183,000	4,923,000	8,889,000	8,526,000
Net income	$ 14,611,000	$ 13,617,000	$ 29,929,000	$ 26,034,000
Earnings per Share:
Basic	$ 0.78	$ 0.72	$ 1.59	$ 1.39
Diluted	$ 0.76	$ 0.71	$ 1.56	$ 1.36
Weighted-average Shares:
Basic	18,805	18,806	18,815	18,738
Diluted	19,133	19,209	19,213	19,208
Cash dividends declared per common share	$ 0.14	$ 0.14	$ 0.28	$ 0.28
Other comprehensive loss, net of tax	$ (2,853,000)	$ (3,317,000)	$ (2,570,000)	$ (1,708,000)
Comprehensive income, net of tax	$ 11,758,000	$ 10,300,000	$ 27,359,000	$ 24,326,000

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows from Operating Activities
Net income	$ 29,929	$ 26,034
Adjustments to reconcile net income to net cash used in operating activities:
Bad debt expense	304	638
Deferred income taxes	2,872	598
Non-cash equity compensation	7,865	5,347
Depreciation and amortization	14,569	13,027
Facilities consolidation reserve	(134)	(127)
Amortization of debt issuance costs	254	256
Impairment of long-lived assets	1,728
Other adjustments, net	(450)	485
Changes in operating assets and liabilities:
Net contract assets and liabilities	(15,508)	(19,658)
Contract receivables	(46,212)	(6,609)
Prepaid expenses and other assets	(1,609)	(7,115)
Accounts payable	(7,569)	(11,283)
Accrued salaries and benefits	3,535	(1,378)
Accrued subcontractors and other direct costs	(17,479)	(17,280)
Accrued expenses and other current liabilities	(11,460)	3,757
Income tax receivable and payable	(8,733)	(7,315)
Other liabilities	152	(1,102)
Net Cash Used in Operating Activities	(47,946)	(21,725)
Cash Flows from Investing Activities
Capital expenditures for property and equipment and capitalized software	(14,516)	(9,397)
Payments for business acquisitions, net of cash received	(1,819)	(11,838)
Net Cash Used in Investing Activities	(16,335)	(21,235)
Cash Flows from Financing Activities
Advances from working capital facilities	378,474	284,773
Payments on working capital facilities	(290,354)	(247,378)
Payments on capital expenditure obligations	(1,621)	(3,131)
Debt issue costs		(21)
Proceeds from exercise of options	429	3,533
Dividends paid	(5,278)	(2,635)
Net payments for stockholder issuances and buybacks	(24,158)	(8,597)
Net Cash Provided by Financing Activities	57,492	26,544
Effect of Exchange Rate Changes on Cash, Cash Equivalents, and Restricted Cash	107	(249)
Decrease in Cash, Cash Equivalents, and Restricted Cash	(6,682)	(16,665)
Cash, Cash Equivalents, and Restricted Cash, Beginning of Period	12,986	24,266
Cash, Cash Equivalents, and Restricted Cash, End of Period	6,304	7,601
Supplemental Disclosure of Cash Flow Information
Interest	4,697	3,641
Income taxes	$ 15,426	11,490
Non-cash investing and financing transactions:
Capital expenditure obligations		$ 6,121

Basis of Presentation and Natur

Basis of Presentation and Nature of Operations	6 Months Ended
	Jun. 30, 2019
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, analysis, assessment and advice to design and implementation of programs and technology-based solutions, as well as 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, 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 and local governments and U.S. territorial governments, unless otherwise indicated. The Company, incorporated in Delaware, is headquartered in Fairfax, Virginia. It maintains offices throughout the world, including 69 offices in the U.S. and U.S. territories and 15 offices in key regions 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 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 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 and six month periods ended June 30, 2019 and 2018 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, 2018 and the notes thereto included in the Company’s Annual Report on Form 10-K, filed with the SEC on February 27, 2019 (the “Annual Report”). Reclassifications Certain amounts in the 2018 consolidated statements of cash flows have been reclassified to conform to the current year presentation. Significant Accounting Policies 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. 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. The Company recognized impairment expense, included in indirect and selling expenses, of $1.7 million in the second quarter of 2019 related to intangible assets associated with a historical business acquisition. Recent Accounting Pronouncements Recent Accounting Pronouncements Adopted Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued a new standard related to leases, Accounting Standard Update (“ASU”) 2016-02, Leases (Topic 842), to increase transparency and comparability among organizations by requiring the recognition of ROU assets and lease liabilities on the balance sheet for those leases classified as operating leases. Under the new standard, required disclosures enable users of financial statements to assess the amount, timing and uncertainty of cash flows arising from leases. The Company, using a modified retrospective adoption approach, is also required to recognize and measure leases existing at the beginning of the period of adoption, with certain practical expedients available. The Company adopted the standard effective January 1, 2019. The Company chose the following practical expedients: not to re-assess existing and expired contracts to determine if they contain embedded leases; not to re-assess lease classification on existing leases; not to re-assess initial direct costs of obtaining leases; to account for lease and non-lease components as a single lease component for equipment leases; and to only apply the standard to leases with a term greater than twelve months. The most significant impact of adopting the standard was the recognition of ROU assets and lease liabilities for operating leases on the Company’s consolidated balance sheets but it did not have a material impact on the Company’s consolidated statements of comprehensive income or consolidated statements of cash flow. The impact to the consolidated balance sheets before and after the adoption are as follows: January 1, 2019 Before Adoption Adoption Adjustments After Adoption Operating lease - right-of-use assets $ — $ 137,152 $ 137,152 Operating lease liabilities - current — 30,951 30,951 Accrued expenses and other current liabilities 1,843 (1,843 ) — Operating lease liabilities - non-current — 121,982 121,982 Deferred rent 13,938 (13,938 ) — Stock Compensation In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718). The standard simplifies the accounting for share-based compensation to non-employees by aligning the guidance with share-based payments to employees. It is effective for interim and annual reporting periods beginning after December 15, 2018. The Company’s adoption of ASU 2018-07 did not have a material impact on the consolidated financial statements. Recent Accounting Pronouncements Not Yet Adopted Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract In August 2018, the FASB issued 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 standard is effective for interim periods and fiscal years beginning after December 15, 2019 with early adoption permitted. The standard may be implemented using either the retrospective or prospective method. The Company is currently in the process of evaluating the impact of adoption and mode of adoption but does not anticipate that there will be a material impact on the consolidated financial statements as a result of adopting the standard. 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 ASU 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 new standard is effective for fiscal years beginning after December 15, 2019 with early adoption permitted. The Company is currently in the process of evaluating the impact of adoption but does not anticipate that there will be a material impact on the consolidated financial statements as a result of adopting the standard.

Contract Receivables, Net

Contract Receivables, Net	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Contract Receivables, Net	NOTE 2 – CONTRACT RECEIVABLES, NET Contract receivables, net consisted of the following: June 30, 2019 December 31, 2018 Billed and billable $ 282,335 $ 236,250 Allowance for doubtful accounts (5,353 ) (5,284 ) Contract receivables, net $ 276,982 $ 230,966

Goodwill

Goodwill	6 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	NOTE 3 – GOODWILL The changes in the carrying amount of goodwill during the six-months period ended June 30, 2019 were as follows: Balance as of December 31, 2018 $ 715,644 Goodwill resulting from business combination - Olson (1) 3,047 Goodwill resulting from business combination - We Are Vista (2) 579 Goodwill resulting from business combination - DMS Disaster Consultants (3) (50 ) Effect of foreign currency translation (103 ) Balance as of June 30, 2019 $ 719,117 (1) (2) (3) Goodwill measurement period adjustment related to the settlement of the extended purchase commitments under the purchase agreement.

Long-Term Debt

Long-Term Debt	6 Months Ended
	Jun. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	NOTE 4 – LONG-TERM DEBT On May 17, 2017, the Company entered into a Fifth Amended and Restated Business Loan and Security Agreement with a syndication of 11 commercial banks (the “Credit Facility”). The Credit Facility: (i) included modifications to the Company’s Fourth Amended and Restated Business Loan and Security Agreement, (ii) matures on May 17, 2022, (iii) increased the borrowing ceiling up to $600.0 million without a borrowing base requirement, taking into account financial, performance-based limitations, and (iv) provided for an “accordion,” which permits additional revolving credit commitments of up to $300.0 million, subject to lenders’ approval. 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 of 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 3.75 to 1.00 (subject to adjustment, in certain circumstances) As of June 30, 2019, the Company had $288.5 million long-term debt outstanding, ten outstanding letters of credit totaling $3.2 million, $1.5 million of net derivative obligations and unused borrowing capacity of $306.8 million

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Leases	NOTE 5 – LEASES The Company has operating leases for facilities and equipment which have remaining terms ranging from 1 to 9 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. Certain 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 June 30, 2019: Real estate facilities $ 145,359 Office equipment 2,203 Other 523 148,085 Amortization of right-of-use assets (15,370 ) Total operating lease right-of-use assets $ 132,715 Rent expense is recognized on a straight-line basis over the lease term. Rent expense consists of the following: Three Months Ended Six Months Ended June 30, 2019 June 30, 2019 Operating lease costs $ 8,610 $ 17,506 Short-term lease costs 322 1,003 Variable lease costs 172 184 Total rent expense 9,104 18,693 Future minimum lease payments under non-cancellable leases as of June 30, 2019 were as follows: June 30, 2020 $ 33,866 June 30, 2021 34,515 June 30, 2022 32,963 June 30, 2023 23,595 June 30, 2024 14,643 Thereafter 22,363 Total future minimum lease payments 161,945 Less: Interest (15,767 ) Total operating lease liabilities $ 146,178 Operating lease liabilities - current $ 29,238 Operating lease liabilities - non-current 116,940 Total operating lease liabilities $ 146,178 Other information related to operating leases is as follows: Six Months Ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 18,594 Right-of-use assets obtained in exchange for new operating lease liabilities $ 14,896 Weighted-average remaining lease term - operating leases 5.1 Weighted-average discount rate - operating leases 3.7 % At June 30, 2019, the Company had additional operating leases that have not yet commenced of $16.7 million. Such operating leases will commence within the next year, with lease terms of 1 year to 8 years.

Other Comprehensive Income (Los

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss	6 Months Ended
	Jun. 30, 2019
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss	NOTE 6 – OTHER COMPREHENSIVE INCOME (LOSS) AND ACCUMULATED OTHER COMPREHENSIVE LOSS Other comprehensive income (loss) 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 June 30, 2019 and 2018 are as follows: Three Months Ended June 30, 2019 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 March 31, 2019 $ (12,914 ) $ 2,031 $ (1,385 ) $ (12,268 ) Current period other comprehensive income (loss): Other comprehensive loss before reclassifications (1,304 ) — (2,173 ) (3,477 ) Amounts reclassified from accumulated other comprehensive income — (180 ) 31 (149 ) Effect of taxes (3) 163 47 563 773 Total current period other comprehensive loss (1,141 ) (133 ) (1,579 ) (2,853 ) Accumulated other comprehensive (loss) income at June 30, 2019 $ (14,055 ) $ 1,898 $ (2,964 ) $ (15,121 ) Six Months Ended June 30, 2019 Foreign Currency Translation Adjustments Gain on Sale of Interest Rate Hedge Agreement (1) Change in Fair Value of Interest Rate Hedge Agreements (2)(5) Total Accumulated other comprehensive (loss) income at January 1, 2019 $ (14,168 ) $ 2,164 $ (547 ) $ (12,551 ) Current period other comprehensive (loss) income: Other comprehensive income (loss) before reclassifications (50 ) — (3,337 ) (3,387 ) Amounts reclassified from accumulated other comprehensive (loss) income — (360 ) 54 (306 ) Effect of taxes (3) 163 94 866 1,123 Total current period other comprehensive income (loss) 113 (266 ) (2,417 ) (2,570 ) Accumulated other comprehensive (loss) income at June 30, 2019 $ (14,055 ) $ 1,898 $ (2,964 ) $ (15,121 ) Three Months Ended June 30, 2018 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 March 31, 2018 $ (7,708 ) $ 2,563 $ 886 $ (4,259 ) Current period other comprehensive (loss) income: Other comprehensive (loss) income before reclassifications (3,561 ) — 181 (3,380 ) Amounts reclassified from accumulated other comprehensive income — (180 ) — (180 ) Effect of taxes (3) 195 48 — 243 Total current period other comprehensive (loss) income (3,366 ) (132 ) 181 (3,317 ) Accumulated other comprehensive (loss) income at June 30, 2018 $ (11,074 ) $ 2,431 $ 1,067 $ (7,576 ) Six Months Ended June 30, 2018 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 January 1, 2018 $ (7,638 ) $ 2,158 $ 441 $ (5,039 ) Reclassification of stranded tax effects due to adoption of accounting principle (4) (1,307 ) 478 — (829 ) Adjusted beginning balance (8,945 ) 2,636 441 (5,868 ) Current period other comprehensive (loss) income: Other comprehensive (loss) income before reclassifications (1,983 ) — 626 (1,357 ) Amounts reclassified from accumulated other comprehensive income — (300 ) — (300 ) Effect of taxes (3) (146 ) 95 — (51 ) Total current period other comprehensive (loss) income (2,129 ) (205 ) 626 (1,708 ) Accumulated other comprehensive (loss) income at June 30, 2018 $ (11,074 ) $ 2,431 $ 1,067 $ (7,576 ) (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 be ing 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. (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 August 31, 2023. (3) The Company’s effective tax rate for the three months ended June 30, 2019 and 2018 was 26.2% and 26.6%, respectively, and 22.9% and 24.7% for the six months ended June 30, 2019 and 2018, respectively. (4) The Company has adjusted the balance at December 31, 2017 of accumulated other comprehensive loss for the stranded tax effects caused by the enactment of the Tax Cuts and Jobs Act of 2017 (the “Tax Act”). (5) The fair value of the fixed interest rate swap is included in other liabilities on the June 30, 2019 consolidated balance sheet.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2019
Stockholders Equity Note [Abstract]
Stockholders' Equity	NOTE 7 – STOCKHOLDERS’ EQUITY Changes in stockholders’ equity for the three and six months ended June 30, 2019 and 2018 are as follows: Three Months Ended June 30, 2019 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at March 31, 2019 18,866 $ 23 $ 330,763 $ 499,126 3,846 $ (155,073 ) $ (12,268 ) $ 662,571 Net income — — — 14,611 — — — 14,611 Other comprehensive income — — — — — — (2,853 ) (2,853 ) Equity compensation — — 3,714 — — — — 3,714 Exercise of stock options 1 — 25 — — — — 25 Issuance of shares pursuant to vesting of restricted stock units 8 — — — — — — — Net payments for stock issuances and buybacks (117 ) — 843 — 129 (9,632 ) — (8,789 ) Dividends declared — — — (2,642 ) — — — (2,642 ) Balance at June 30, 2019 18,758 $ 23 $ 335,345 $ 511,095 3,975 $ (164,705 ) $ (15,121 ) $ 666,637 Six Months Ended June 30, 2019 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at January 1, 2019 18,817 $ 22 $ 326,208 $ 486,442 3,629 $ (139,704 ) $ (12,551 ) $ 660,417 Net income — — — 29,929 — — — 29,929 Other comprehensive income — — — — — — (2,570 ) (2,570 ) Equity compensation — — 7,865 — — — — 7,865 Exercise of stock options 12 — 429 — — — — 429 Issuance of shares pursuant to vesting of restricted stock units 263 1 — — — — — 1 Net payments for stock issuances and buybacks (334 ) — 843 — 346 (25,001 ) — (24,158 ) Dividends declared — — — (5,276 ) — — — (5,276 ) Balance at June 30, 2019 18,758 $ 23 $ 335,345 $ 511,095 3,975 $ (164,705 ) $ (15,121 ) $ 666,637 Three Months Ended June 30, 2018 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at March 31, 2018 18,767 $ 22 $ 311,941 $ 445,375 3,512 $ (130,578 ) $ (4,259 ) $ 622,501 Net income — — — 13,617 — — — 13,617 Other comprehensive income — — — — — — (3,317 ) (3,317 ) Equity compensation — — 2,895 — — 64 — 2,959 Exercise of stock options 49 — 1,733 — — — — 1,733 Issuance of shares pursuant to vesting of restricted stock units 3 — — — (3 ) — — — Net payments for stock issuances and buybacks 7 — 444 — (7 ) 68 — 512 Dividends declared — — — (2,634 ) — — — (2,634 ) Balance at June 30, 2018 18,826 $ 22 $ 317,013 $ 456,358 3,502 $ (130,446 ) $ (7,576 ) $ 635,371 Six Months Ended June 30, 2018 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at January 1, 2018 18,662 $ 22 $ 307,821 $ 434,766 3,357 $ (121,540 ) $ (5,039 ) $ 616,030 Net income — — — 26,034 — — — 26,034 Other comprehensive income — — — — — — (1,708 ) (1,708 ) Equity compensation — — 5,215 — — 135 — 5,350 Exercise of stock options 125 — 3,533 — — — — 3,533 Issuance of shares pursuant to vesting of restricted stock units 190 — — — (6 ) — — — Net payments for stock issuances and buybacks (151 ) — 444 — 151 (9,041 ) — (8,597 ) Reclassification of stranded tax effects due to adoption of accounting principle — — — 829 — — (829 ) — Dividends declared — — — (5,271 ) — — — (5,271 ) Balance at June 30, 2018 18,826 $ 22 $ 317,013 $ 456,358 3,502 $ (130,446 ) $ (7,576 ) $ 635,371

Restricted Cash

Restricted Cash	6 Months Ended
	Jun. 30, 2019
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 six months ended June 30, 2019 and 2018: 2019 2018 Beginning Ending Beginning Ending Cash and cash equivalents $ 11,694 $ 6,304 $ 11,809 $ 6,322 Restricted cash - current (1) — — 11,191 — Restricted cash - non-current 1,292 — 1,266 1,279 Total of cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows $ 12,986 $ 6,304 $ 24,266 $ 7,601 (1) Restricted cash – current at the beginning of 2018 represents an amount held in an escrow account for a business acquisition.

Revenue Recognition

Revenue Recognition	6 Months Ended
	Jun. 30, 2019
Disaggregation Of Revenue [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 market revenue information provides 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. Finally, 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 from energy, environment, and infrastructure client markets, and U.S. state and local governments in the three and six months ended June 30, 2019 compared to the prior year period were primarily due to work performed on disaster recovery and relief efforts which also caused an increase in revenue generated through time-and-materials contracts. Consumer and financial services client market revenue increased primarily due to acquisitions during the prior year . Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Dollars Percent Dollars Percent Dollars Percent Dollars Percent Client Markets: Energy, environment, and infrastructure $ 166,998 46 % $ 133,276 41 % $ 320,988 46 % $ 257,526 41 % Health, education, and social programs 133,919 36 % 131,141 41 % 255,057 36 % 254,069 41 % Safety and security 29,818 8 % 27,491 8 % 59,047 8 % 52,966 8 % Consumer and financial services 35,982 10 % 32,407 10 % 72,879 10 % 62,534 10 % Total $ 366,717 100 % $ 324,315 100 % $ 707,971 100 % $ 627,095 100 % Three Months Ended Six Months Ended June 30, June 30, 2019 June 30, 2018 2019 2018 Dollars Percent Dollars Percent Dollars Percent Dollars Percent Client Type: U.S. federal government $ 141,193 38 % $ 139,517 43 % $ 273,363 39 % $ 273,750 44 % U.S. state and local government 72,893 20 % 34,532 11 % 138,400 19 % 65,889 10 % International government 31,652 9 % 34,615 11 % 58,865 8 % 63,383 10 % Total Government 245,738 67 % 208,664 65 % 470,628 66 % 403,022 64 % Commercial 120,979 33 % 115,651 35 % 237,343 34 % 224,073 36 % Total $ 366,717 100 % $ 324,315 100 % $ 707,971 100 % $ 627,095 100 % Three Months Ended Six Months Ended June 30, June 30, 2019 June 30, 2018 2019 2018 Dollars Percent Dollars Percent Dollars Percent Dollars Percent Contract Mix: Time-and-materials $ 167,457 46 % $ 128,103 39 % $ 323,459 46 % $ 252,290 40 % Fixed price 146,516 40 % 136,220 42 % 280,119 40 % 258,609 41 % Cost-based 52,744 14 % 59,992 19 % 104,393 14 % 116,196 19 % Total $ 366,717 100 % $ 324,315 100 % $ 707,971 100 % $ 627,095 100 % 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 contact assets (liabilities) increased $15.3 million due primarily to increases in contract assets and by a slight decrease in contract liabilities. The increase in contract assets is primarily due to hurricane relief and rebuild work for U.S. state and local governments, which is considered part of the energy, environment and infrastructure client market, and most of which has been performed on time-and-materials agreements. There were no material changes to contract balances due to impairments or business combinations during the period. June 30, 2019 December 31, 2018 $ Change % Change Contract assets $ 141,960 $ 126,688 $ 15,272 12.1 % Contract liabilities (33,435 ) (33,494 ) 59 (0.2 %) Net contract assets (liabilities) $ 108,525 $ 93,194 $ 15,331 16.5 % Performance Obligations: The Company had $1.5 billion in unfulfilled performance obligations as of June 30, 2019, 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.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 10 – The Company’s effective tax rate for the three months ended June 30, 2019 and 2018 was 26.2% and 26.6%, respectively, and 22.9% and 24.7% for the six months ended June 30, 2019 and 2018, 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 2015 through 2017 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 2014 to 2017. The Company’s total liability for unrecognized tax benefits as of June 30, 2019 was $0.2 million. There were $0.2 million The Company does not recognize accrued interest and penalties related to unrecognized tax benefits 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. On December 20, 2017, the U.S. Congress passed the Tax Act, which was signed into law on December 22, 2017 and was generally effective beginning January 1, 2018. The Company has been impacted in several ways as a result of the Tax Act, including, but not limited to, a permanent reduction in the federal corporate income tax rate from 35% to 21%. The Company completed the accounting for the tax effects of the enactment of the Tax Act in the fourth quarter of 2018. The Tax Act subjects U.S. corporations to current tax on global intangible low-taxed income (or “GILTI”) earned by certain foreign subsidiaries. Pursuant to a FASB Staff Q&A, Topic 740 No. 5, “Accounting for Global Intangible Low-Taxed Income”, states that an entity can make an accounting policy election to either recognize deferred taxes for temporary differences expected to reverse as GILTI in future years or provide for the tax expense related to GILTI resulting from those items in the year the tax is incurred. The Company elected in the first quarter of fiscal year 2018 to recognize the resulting tax on GILTI as a period expense in the period the tax was incurred. The GILTI tax provision for the three and six months ended June 30, 2019 and 2018 was immaterial.

Accounting for Stock Compensati

Accounting for Stock Compensation	6 Months Ended
	Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Accounting for Stock Compensation	NOTE 11 – 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 340,134 as of June 30, 2019, 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 June 30, 2019, the Company had approximately 914,603 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 six months ended June 30, 2019, the Company granted to its employees 139,633 shares in the form of RSUs with an average grant date fair value of $76.56, and the equivalent value of 97,633 shares in the form of CSRSUs with an average grant date fair value of $76.56. During the six months ended June 30, 2019, the Company also granted 47,290 shares in the form of PSAs to its employees with a grant date fair value of $82.38 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 2019 have a performance period from January 1, 2019 through December 31, 2021 and the performance conditions are consistent with the PSAs granted in prior years. The Company recognized stock-based compensation expense of $5.9 million and $5.4 million for the three months ended June 30, 2019 and 2018, respectively, and $12.6 million and $10.2 million for the six months ended June 30, 2019 and 2018, respectively. Unrecognized compensation expense of approximately $18.8 million as of June 30, 2019 related to unsettled RSUs is expected to be recognized over a weighted-average period of 2.0 1.7 1.4

Earnings Per Share

Earnings Per Share	6 Months Ended
	Jun. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	NOTE 12 – 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 June 30, 2019, the PSAs granted during the year ended December 31, 2017 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, 2018 and during the six months ended June 30, 2019 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 June 30, 2019 and 2018, respectively, and 1,743 and 12,415 shares were excluded for the six months ended June 30, 2019 and 2018, respectively. 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 Six Months Ended June 30, June 30, 2019 2018 2019 2018 Net Income $ 14,611 $ 13,617 $ 29,929 $ 26,034 Weighted-average number of basic shares outstanding during the period 18,805 18,806 18,815 18,738 Dilutive effect of stock options, RSUs, and performance shares 328 403 398 470 Weighted-average number of diluted shares outstanding during the period 19,133 19,209 19,213 19,208 Basic earnings per share $ 0.78 $ 0.72 $ 1.59 $ 1.39 Diluted earnings per share $ 0.76 $ 0.71 $ 1.56 $ 1.36

Share Repurchase Program

Share Repurchase Program	6 Months Ended
	Jun. 30, 2019
Equity [Abstract]
Share Repurchase Program	NOTE 13 – SHARE REPURCHASE PROGRAM The Company’s current share repurchase program allows 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. 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 3.25 to 1.00. As of June 30, 2019, $68.0 million remained available for share repurchases under the approved share repurchase program.

Subsequent Events

Subsequent Events	6 Months Ended
	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	NOTE 14 – On August 1, 2019, the Company’s board of directors approved a $0.14 per share cash dividend. The dividend will be paid on October 15, 2019 to shareholders of record as of the close of business on September 13, 2019.

Contingencies

Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Contingencies	NOTE 15 – 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. The State of Louisiana separately supplemented the amount of recovery it is seeking 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 seeks 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 and stated that his deferral would not be deemed to grant or deny any portion of the OCD’s claim. The Commissioner subsequently 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 and intends to vigorously defend its position. The Company believes, based on current information, that this matter is not expected to have a material adverse effect on the Company’s financial position, results of operations or cash flows. The Company has not recorded a liability.

Basis of Presentation and Nat_2

Basis of Presentation and Nature of Operations (Policies)	6 Months Ended
	Jun. 30, 2019
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 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 Certain amounts in the 2018 consolidated statements of cash flows have been reclassified to conform to the current year presentation.
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.
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. The Company recognized impairment expense, included in indirect and selling expenses, of $1.7 million in the second quarter of 2019 related to intangible assets associated with a historical business acquisition.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Recent Accounting Pronouncements Adopted Leases In February 2016, the Financial Accounting Standards Board (“FASB”) issued a new standard related to leases, Accounting Standard Update (“ASU”) 2016-02, Leases (Topic 842), to increase transparency and comparability among organizations by requiring the recognition of ROU assets and lease liabilities on the balance sheet for those leases classified as operating leases. Under the new standard, required disclosures enable users of financial statements to assess the amount, timing and uncertainty of cash flows arising from leases. The Company, using a modified retrospective adoption approach, is also required to recognize and measure leases existing at the beginning of the period of adoption, with certain practical expedients available. The Company adopted the standard effective January 1, 2019. The Company chose the following practical expedients: not to re-assess existing and expired contracts to determine if they contain embedded leases; not to re-assess lease classification on existing leases; not to re-assess initial direct costs of obtaining leases; to account for lease and non-lease components as a single lease component for equipment leases; and to only apply the standard to leases with a term greater than twelve months. The most significant impact of adopting the standard was the recognition of ROU assets and lease liabilities for operating leases on the Company’s consolidated balance sheets but it did not have a material impact on the Company’s consolidated statements of comprehensive income or consolidated statements of cash flow. The impact to the consolidated balance sheets before and after the adoption are as follows: January 1, 2019 Before Adoption Adoption Adjustments After Adoption Operating lease - right-of-use assets $ — $ 137,152 $ 137,152 Operating lease liabilities - current — 30,951 30,951 Accrued expenses and other current liabilities 1,843 (1,843 ) — Operating lease liabilities - non-current — 121,982 121,982 Deferred rent 13,938 (13,938 ) — Stock Compensation In June 2018, the FASB issued ASU 2018-07, Compensation—Stock Compensation (Topic 718). The standard simplifies the accounting for share-based compensation to non-employees by aligning the guidance with share-based payments to employees. It is effective for interim and annual reporting periods beginning after December 15, 2018. The Company’s adoption of ASU 2018-07 did not have a material impact on the consolidated financial statements. Recent Accounting Pronouncements Not Yet Adopted Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract In August 2018, the FASB issued 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 standard is effective for interim periods and fiscal years beginning after December 15, 2019 with early adoption permitted. The standard may be implemented using either the retrospective or prospective method. The Company is currently in the process of evaluating the impact of adoption and mode of adoption but does not anticipate that there will be a material impact on the consolidated financial statements as a result of adopting the standard. 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 ASU 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 new standard is effective for fiscal years beginning after December 15, 2019 with early adoption permitted. The Company is currently in the process of evaluating the impact of adoption but does not anticipate that there will be a material impact on the consolidated financial statements as a result of adopting the standard.

Basis of Presentation and Nat_3

Basis of Presentation and Nature of Operations (Tables)	6 Months Ended
	Jun. 30, 2019
Accounting Policies [Abstract]
Schedule of Impact to Consolidated Balance Sheets Before and After the Adoption	The most significant impact of adopting the standard was the recognition of ROU assets and lease liabilities for operating leases on the Company’s consolidated balance sheets but it did not have a material impact on the Company’s consolidated statements of comprehensive income or consolidated statements of cash flow. The impact to the consolidated balance sheets before and after the adoption are as follows: January 1, 2019 Before Adoption Adoption Adjustments After Adoption Operating lease - right-of-use assets $ — $ 137,152 $ 137,152 Operating lease liabilities - current — 30,951 30,951 Accrued expenses and other current liabilities 1,843 (1,843 ) — Operating lease liabilities - non-current — 121,982 121,982 Deferred rent 13,938 (13,938 ) —

Contract Receivables, Net (Tabl

Contract Receivables, Net (Tables)	6 Months Ended
	Jun. 30, 2019
Receivables [Abstract]
Summary of Contract Receivables, Net	Contract receivables, net consisted of the following: June 30, 2019 December 31, 2018 Billed and billable $ 282,335 $ 236,250 Allowance for doubtful accounts (5,353 ) (5,284 ) Contract receivables, net $ 276,982 $ 230,966

Goodwill (Tables)

Goodwill (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Schedule of Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill during the six-months period ended June 30, 2019 were as follows: Balance as of December 31, 2018 $ 715,644 Goodwill resulting from business combination - Olson (1) 3,047 Goodwill resulting from business combination - We Are Vista (2) 579 Goodwill resulting from business combination - DMS Disaster Consultants (3) (50 ) Effect of foreign currency translation (103 ) Balance as of June 30, 2019 $ 719,117 (1) (2) (3) Goodwill measurement period adjustment related to the settlement of the extended purchase commitments under the purchase agreement.

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases [Abstract]
Summary of Operating Leases	Operating leases consisted of the following at June 30, 2019: Real estate facilities $ 145,359 Office equipment 2,203 Other 523 148,085 Amortization of right-of-use assets (15,370 ) Total operating lease right-of-use assets $ 132,715
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 Six Months Ended June 30, 2019 June 30, 2019 Operating lease costs $ 8,610 $ 17,506 Short-term lease costs 322 1,003 Variable lease costs 172 184 Total rent expense 9,104 18,693
Summary of Future Minimum Lease Payments Under Non-Cancellable Leases	Future minimum lease payments under non-cancellable leases as of June 30, 2019 were as follows: June 30, 2020 $ 33,866 June 30, 2021 34,515 June 30, 2022 32,963 June 30, 2023 23,595 June 30, 2024 14,643 Thereafter 22,363 Total future minimum lease payments 161,945 Less: Interest (15,767 ) Total operating lease liabilities $ 146,178 Operating lease liabilities - current $ 29,238 Operating lease liabilities - non-current 116,940 Total operating lease liabilities $ 146,178
Summary of Other Information Related to Operating Leases	Other information related to operating leases is as follows: Six Months Ended June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 18,594 Right-of-use assets obtained in exchange for new operating lease liabilities $ 14,896 Weighted-average remaining lease term - operating leases 5.1 Weighted-average discount rate - operating leases 3.7 %

Other Comprehensive Income (L_2

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Jun. 30, 2019
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Components of Other Comprehensive Income and Components of Accumulated Other Comprehensive Loss	Other comprehensive income (loss) 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 June 30, 2019 and 2018 are as follows: Three Months Ended June 30, 2019 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 March 31, 2019 $ (12,914 ) $ 2,031 $ (1,385 ) $ (12,268 ) Current period other comprehensive income (loss): Other comprehensive loss before reclassifications (1,304 ) — (2,173 ) (3,477 ) Amounts reclassified from accumulated other comprehensive income — (180 ) 31 (149 ) Effect of taxes (3) 163 47 563 773 Total current period other comprehensive loss (1,141 ) (133 ) (1,579 ) (2,853 ) Accumulated other comprehensive (loss) income at June 30, 2019 $ (14,055 ) $ 1,898 $ (2,964 ) $ (15,121 ) Six Months Ended June 30, 2019 Foreign Currency Translation Adjustments Gain on Sale of Interest Rate Hedge Agreement (1) Change in Fair Value of Interest Rate Hedge Agreements (2)(5) Total Accumulated other comprehensive (loss) income at January 1, 2019 $ (14,168 ) $ 2,164 $ (547 ) $ (12,551 ) Current period other comprehensive (loss) income: Other comprehensive income (loss) before reclassifications (50 ) — (3,337 ) (3,387 ) Amounts reclassified from accumulated other comprehensive (loss) income — (360 ) 54 (306 ) Effect of taxes (3) 163 94 866 1,123 Total current period other comprehensive income (loss) 113 (266 ) (2,417 ) (2,570 ) Accumulated other comprehensive (loss) income at June 30, 2019 $ (14,055 ) $ 1,898 $ (2,964 ) $ (15,121 ) Three Months Ended June 30, 2018 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 March 31, 2018 $ (7,708 ) $ 2,563 $ 886 $ (4,259 ) Current period other comprehensive (loss) income: Other comprehensive (loss) income before reclassifications (3,561 ) — 181 (3,380 ) Amounts reclassified from accumulated other comprehensive income — (180 ) — (180 ) Effect of taxes (3) 195 48 — 243 Total current period other comprehensive (loss) income (3,366 ) (132 ) 181 (3,317 ) Accumulated other comprehensive (loss) income at June 30, 2018 $ (11,074 ) $ 2,431 $ 1,067 $ (7,576 ) Six Months Ended June 30, 2018 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 January 1, 2018 $ (7,638 ) $ 2,158 $ 441 $ (5,039 ) Reclassification of stranded tax effects due to adoption of accounting principle (4) (1,307 ) 478 — (829 ) Adjusted beginning balance (8,945 ) 2,636 441 (5,868 ) Current period other comprehensive (loss) income: Other comprehensive (loss) income before reclassifications (1,983 ) — 626 (1,357 ) Amounts reclassified from accumulated other comprehensive income — (300 ) — (300 ) Effect of taxes (3) (146 ) 95 — (51 ) Total current period other comprehensive (loss) income (2,129 ) (205 ) 626 (1,708 ) Accumulated other comprehensive (loss) income at June 30, 2018 $ (11,074 ) $ 2,431 $ 1,067 $ (7,576 ) (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 be ing 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. (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 August 31, 2023. (3) The Company’s effective tax rate for the three months ended June 30, 2019 and 2018 was 26.2% and 26.6%, respectively, and 22.9% and 24.7% for the six months ended June 30, 2019 and 2018, respectively. (4) The Company has adjusted the balance at December 31, 2017 of accumulated other comprehensive loss for the stranded tax effects caused by the enactment of the Tax Cuts and Jobs Act of 2017 (the “Tax Act”). (5) The fair value of the fixed interest rate swap is included in other liabilities on the June 30, 2019 consolidated balance sheet.

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2019
Stockholders Equity Note [Abstract]
Schedule of Changes in Stockholders' Equity	Changes in stockholders’ equity for the three and six months ended June 30, 2019 and 2018 are as follows: Three Months Ended June 30, 2019 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at March 31, 2019 18,866 $ 23 $ 330,763 $ 499,126 3,846 $ (155,073 ) $ (12,268 ) $ 662,571 Net income — — — 14,611 — — — 14,611 Other comprehensive income — — — — — — (2,853 ) (2,853 ) Equity compensation — — 3,714 — — — — 3,714 Exercise of stock options 1 — 25 — — — — 25 Issuance of shares pursuant to vesting of restricted stock units 8 — — — — — — — Net payments for stock issuances and buybacks (117 ) — 843 — 129 (9,632 ) — (8,789 ) Dividends declared — — — (2,642 ) — — — (2,642 ) Balance at June 30, 2019 18,758 $ 23 $ 335,345 $ 511,095 3,975 $ (164,705 ) $ (15,121 ) $ 666,637 Six Months Ended June 30, 2019 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at January 1, 2019 18,817 $ 22 $ 326,208 $ 486,442 3,629 $ (139,704 ) $ (12,551 ) $ 660,417 Net income — — — 29,929 — — — 29,929 Other comprehensive income — — — — — — (2,570 ) (2,570 ) Equity compensation — — 7,865 — — — — 7,865 Exercise of stock options 12 — 429 — — — — 429 Issuance of shares pursuant to vesting of restricted stock units 263 1 — — — — — 1 Net payments for stock issuances and buybacks (334 ) — 843 — 346 (25,001 ) — (24,158 ) Dividends declared — — — (5,276 ) — — — (5,276 ) Balance at June 30, 2019 18,758 $ 23 $ 335,345 $ 511,095 3,975 $ (164,705 ) $ (15,121 ) $ 666,637 Three Months Ended June 30, 2018 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at March 31, 2018 18,767 $ 22 $ 311,941 $ 445,375 3,512 $ (130,578 ) $ (4,259 ) $ 622,501 Net income — — — 13,617 — — — 13,617 Other comprehensive income — — — — — — (3,317 ) (3,317 ) Equity compensation — — 2,895 — — 64 — 2,959 Exercise of stock options 49 — 1,733 — — — — 1,733 Issuance of shares pursuant to vesting of restricted stock units 3 — — — (3 ) — — — Net payments for stock issuances and buybacks 7 — 444 — (7 ) 68 — 512 Dividends declared — — — (2,634 ) — — — (2,634 ) Balance at June 30, 2018 18,826 $ 22 $ 317,013 $ 456,358 3,502 $ (130,446 ) $ (7,576 ) $ 635,371 Six Months Ended June 30, 2018 Common Stock Additional Paid-in Retained Treasury Stock Accumulated Other Comprehensive Shares Amount Capital Earnings Shares Amount Loss Total Balance at January 1, 2018 18,662 $ 22 $ 307,821 $ 434,766 3,357 $ (121,540 ) $ (5,039 ) $ 616,030 Net income — — — 26,034 — — — 26,034 Other comprehensive income — — — — — — (1,708 ) (1,708 ) Equity compensation — — 5,215 — — 135 — 5,350 Exercise of stock options 125 — 3,533 — — — — 3,533 Issuance of shares pursuant to vesting of restricted stock units 190 — — — (6 ) — — — Net payments for stock issuances and buybacks (151 ) — 444 — 151 (9,041 ) — (8,597 ) Reclassification of stranded tax effects due to adoption of accounting principle — — — 829 — — (829 ) — Dividends declared — — — (5,271 ) — — — (5,271 ) Balance at June 30, 2018 18,826 $ 22 $ 317,013 $ 456,358 3,502 $ (130,446 ) $ (7,576 ) $ 635,371

Restricted Cash (Tables)

Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2019
Restricted Cash And Cash Equivalents Current [Abstract]
Reconciliation of Cash and Cash Equivalents, and 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 six months ended June 30, 2019 and 2018: 2019 2018 Beginning Ending Beginning Ending Cash and cash equivalents $ 11,694 $ 6,304 $ 11,809 $ 6,322 Restricted cash - current (1) — — 11,191 — Restricted cash - non-current 1,292 — 1,266 1,279 Total of cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows $ 12,986 $ 6,304 $ 24,266 $ 7,601 (1) Restricted cash – current at the beginning of 2018 represents an amount held in an escrow account for a business acquisition.

Revenue Recognition (Tables)

Revenue Recognition (Tables)	6 Months Ended
	Jun. 30, 2019
Disaggregation Of Revenue [Abstract]
Disaggregation of Revenue	Disaggregation of Revenue Three Months Ended June 30, Six Months Ended June 30, 2019 2018 2019 2018 Dollars Percent Dollars Percent Dollars Percent Dollars Percent Client Markets: Energy, environment, and infrastructure $ 166,998 46 % $ 133,276 41 % $ 320,988 46 % $ 257,526 41 % Health, education, and social programs 133,919 36 % 131,141 41 % 255,057 36 % 254,069 41 % Safety and security 29,818 8 % 27,491 8 % 59,047 8 % 52,966 8 % Consumer and financial services 35,982 10 % 32,407 10 % 72,879 10 % 62,534 10 % Total $ 366,717 100 % $ 324,315 100 % $ 707,971 100 % $ 627,095 100 % Three Months Ended Six Months Ended June 30, June 30, 2019 June 30, 2018 2019 2018 Dollars Percent Dollars Percent Dollars Percent Dollars Percent Client Type: U.S. federal government $ 141,193 38 % $ 139,517 43 % $ 273,363 39 % $ 273,750 44 % U.S. state and local government 72,893 20 % 34,532 11 % 138,400 19 % 65,889 10 % International government 31,652 9 % 34,615 11 % 58,865 8 % 63,383 10 % Total Government 245,738 67 % 208,664 65 % 470,628 66 % 403,022 64 % Commercial 120,979 33 % 115,651 35 % 237,343 34 % 224,073 36 % Total $ 366,717 100 % $ 324,315 100 % $ 707,971 100 % $ 627,095 100 % Three Months Ended Six Months Ended June 30, June 30, 2019 June 30, 2018 2019 2018 Dollars Percent Dollars Percent Dollars Percent Dollars Percent Contract Mix: Time-and-materials $ 167,457 46 % $ 128,103 39 % $ 323,459 46 % $ 252,290 40 % Fixed price 146,516 40 % 136,220 42 % 280,119 40 % 258,609 41 % Cost-based 52,744 14 % 59,992 19 % 104,393 14 % 116,196 19 % Total $ 366,717 100 % $ 324,315 100 % $ 707,971 100 % $ 627,095 100 %
Schedule of Contract Balances and Changes in Contract Balances	Contract Balances: June 30, 2019 December 31, 2018 $ Change % Change Contract assets $ 141,960 $ 126,688 $ 15,272 12.1 % Contract liabilities (33,435 ) (33,494 ) 59 (0.2 %) Net contract assets (liabilities) $ 108,525 $ 93,194 $ 15,331 16.5 %

Earnings Per Share (Tables)

Earnings Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
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 Six Months Ended June 30, June 30, 2019 2018 2019 2018 Net Income $ 14,611 $ 13,617 $ 29,929 $ 26,034 Weighted-average number of basic shares outstanding during the period 18,805 18,806 18,815 18,738 Dilutive effect of stock options, RSUs, and performance shares 328 403 398 470 Weighted-average number of diluted shares outstanding during the period 19,133 19,209 19,213 19,208 Basic earnings per share $ 0.78 $ 0.72 $ 1.59 $ 1.39 Diluted earnings per share $ 0.76 $ 0.71 $ 1.56 $ 1.36

Basis of Presentation and Nat_4

Basis of Presentation and Nature of Operations - Additional Information (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)Office	Jun. 30, 2019OfficeSegment
Basis of Presentation and Nature of Operations [Line Items]
Number of operating segments | Segment		1
Number of reporting segments | Segment		1
Indirect and Selling Expenses
Basis of Presentation and Nature of Operations [Line Items]
Impairment expense related to intangible assets | $	$ 1.7
Domestic
Basis of Presentation and Nature of Operations [Line Items]
Number of offices | Office	69	69
International
Basis of Presentation and Nature of Operations [Line Items]
Number of offices | Office	15	15

Basis of Presentation and Nat_5

Basis of Presentation and Nature of Operations - Schedule of Impact to Consolidated Balance Sheets Before and After the Adoption (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Basis of Presentation and Nature of Operations [Line Items]
Operating lease - right-of-use assets	$ 132,715
Operating lease liabilities - current	29,238
Accrued expenses and other current liabilities	27,311		$ 39,072
Operating lease liabilities - non-current	$ 116,940
Deferred rent			$ 13,938
Accounting Standards Update 2016-02
Basis of Presentation and Nature of Operations [Line Items]
Operating lease - right-of-use assets		$ 137,152
Operating lease liabilities - current		30,951
Operating lease liabilities - non-current		121,982
Accounting Standards Update 2016-02 | Before Adoption
Basis of Presentation and Nature of Operations [Line Items]
Accrued expenses and other current liabilities		1,843
Deferred rent		13,938
Accounting Standards Update 2016-02 | Adoption Adjustments
Basis of Presentation and Nature of Operations [Line Items]
Operating lease - right-of-use assets		137,152
Operating lease liabilities - current		30,951
Accrued expenses and other current liabilities		(1,843)
Operating lease liabilities - non-current		121,982
Deferred rent		$ (13,938)

Contract Receivables, Net - Sum

Contract Receivables, Net - Summary of Contract Receivables, Net (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Receivables [Abstract]
Billed and billable	$ 282,335	$ 236,250
Allowance for doubtful accounts	(5,353)	(5,284)
Contract receivables, net	$ 276,982	$ 230,966

Goodwill - Schedule of Changes

Goodwill - Schedule of Changes in Carrying Amount of Goodwill (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Goodwill [Line Items]
Balance as of December 31, 2018	$ 715,644
Effect of foreign currency translation	(103)
Balance as of June 30, 2019	719,117
Olson
Goodwill [Line Items]
Goodwill resulting from business combinations	3,047	[1]
Vista Limited
Goodwill [Line Items]
Goodwill resulting from business combinations	579	[2]
DMS Disaster Consultants
Goodwill [Line Items]
Goodwill resulting from business combinations	$ (50)	[3]
[1]	In 2019, the Company recorded changes to goodwill representing an immaterial correction of an error for income tax balances related to acquired assets and liabilities from the business combination that occurred in 2014.  These balances were not significant to our previously reported financial position.
[2]	Goodwill measurement period adjustment related to the settlement of the working capital adjustment under the purchase agreement.
[3]	Goodwill measurement period adjustment related to the settlement of the extended purchase commitments under the purchase agreement.

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Details)	May 17, 2017USD ($)Bank	Jun. 30, 2019USD ($)	Dec. 31, 2018USD ($)	Jun. 30, 2018
Debt Instrument [Line Items]
Credit facility syndication, number of commercial banks | Bank	11
Line of credit facility, expiration date		May 17, 2022
Line of credit facility, maximum borrowing capacity without borrowing base requirement	$ 600,000,000
Line of credit facility, accordion feature, additional revolving credit commitments under existing loan facility	300,000,000
Line of credit facility, maximum borrowing capacity	$ 60,000,000
Line of credit facility, interest coverage ratio covenant	300.00%
Line of credit facility, leverage ratio covenant	375.00%
Long-term debt		$ 288,544,000	$ 200,424,000
Number of letters of credit, outstanding		10
Letters of credit outstanding, amount		$ 3,200,000
Derivative obligation, net		1,500,000
Line of credit facility, remaining borrowing capacity		306,800,000
Line of credit facility, current borrowing capacity		$ 231,700,000
Long-term debt, weighted average interest rate, at point in time		3.75%		3.01%
Minimum
Debt Instrument [Line Items]
Line of Credit Facility, Committement Fee Unused Capacity	0.13%
Maximum
Debt Instrument [Line Items]
Line of Credit Facility, Committement Fee Unused Capacity	0.25%
Federal Funds Open Rate
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
London Interbank Offered Rate (LIBOR) | Minimum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	1.00%
London Interbank Offered Rate (LIBOR) | Maximum
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.00%

Leases - Additional Information

Leases - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019USD ($)
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	$ 16.7
Minimum
Lessee Lease Description [Line Items]
Operating leases, remaining lease term	1 year
Additional operating leases not yet commenced, lease terms	1 year
Maximum
Lessee Lease Description [Line Items]
Operating leases, remaining lease term	9 years
Operating leases, extendable lease term	5 years
Operating leases, termination lease term	1 year
Additional operating leases not yet commenced, lease terms	8 years

Leases - Summary of Operating L

Leases - Summary of Operating Leases (Details) $ in Thousands	Jun. 30, 2019USD ($)
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 148,085
Amortization of right-of-use assets	(15,370)
Total operating lease right-of-use assets	132,715
Real Estate Facilities
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	145,359
Office Equipment
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	2,203
Other
Lessee Lease Description [Line Items]
Operating lease right of use assets, gross	$ 523

Leases - Summary of Rent Expens

Leases - Summary of Rent Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Leases [Abstract]
Operating lease costs	$ 8,610	$ 17,506
Short-term lease costs	322	1,003
Variable lease costs	172	184
Total rent expense	$ 9,104	$ 18,693

Leases - Summary of Future Mini

Leases - Summary of Future Minimum Lease Payments Under Non-Cancellable Leases (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases [Abstract]
June 30, 2020	$ 33,866
June 30, 2021	34,515
June 30, 2022	32,963
June 30, 2023	23,595
June 30, 2024	14,643
Thereafter	22,363
Total future minimum lease payments	161,945
Less: Interest	(15,767)
Total operating lease liabilities	146,178
Operating lease liabilities - current	29,238
Operating lease liabilities - non-current	116,940
Total operating lease liabilities	$ 146,178

Leases - Summary of Other Infor

Leases - Summary of Other Information Related to Operating Leases (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 18,594
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 14,896
Weighted-average remaining lease term - operating leases	5 years 1 month 6 days
Weighted-average discount rate - operating leases	3.70%

Other Comprehensive Income (L_3

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		$ 662,571	$ 622,501	$ 660,417	$ 616,030
Current period other comprehensive income (loss):
Total current period other comprehensive (loss) income		(2,853)	(3,317)	(2,570)	(1,708)
Balance		666,637	635,371	666,637	635,371
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(12,914)	(7,708)	(14,168)	(7,638)
Reclassification of stranded tax effects due to adoption of accounting principle	[1]				(1,307)
Adjusted beginning balance						$ (8,945)
Current period other comprehensive income (loss):
Other comprehensive income (loss) before reclassifications		(1,304)	(3,561)	(50)	(1,983)
Amounts reclassified from accumulated other comprehensive (loss) income		0
Effect of taxes	[2]	163	195	163	(146)
Total current period other comprehensive (loss) income		(1,141)	(3,366)	113	(2,129)
Balance		(14,055)	(11,074)	(14,055)	(11,074)
Gain on Sale of Interest Rate Hedge Agreement
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	[3]	2,031	2,563	2,164	2,158
Reclassification of stranded tax effects due to adoption of accounting principle	[1],[3]				478
Adjusted beginning balance	[3]					2,636
Current period other comprehensive income (loss):
Other comprehensive income (loss) before reclassifications	[3]	0
Amounts reclassified from accumulated other comprehensive (loss) income	[3]	(180)	(180)	(360)	(300)
Effect of taxes	[2],[3]	47	48	94	95
Total current period other comprehensive (loss) income	[3]	(133)	(132)	(266)	(205)
Balance	[3]	1,898	2,431	1,898	2,431
Change in Fair Value of Interest Rate Hedge Agreements
Accumulated Other Comprehensive Income Loss [Line Items]
Balance	[4],[5]	(1,385)	886	(547)	441
Adjusted beginning balance	[4],[5]					441
Current period other comprehensive income (loss):
Other comprehensive income (loss) before reclassifications	[4],[5]	(2,173)	181	(3,337)	626
Amounts reclassified from accumulated other comprehensive (loss) income	[4],[5]	31		54
Effect of taxes	[2],[4],[5]	563		866
Total current period other comprehensive (loss) income	[4],[5]	(1,579)	181	(2,417)	626
Balance	[4],[5]	(2,964)	1,067	(2,964)	1,067
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income Loss [Line Items]
Balance		(12,268)	(4,259)	(12,551)	(5,039)
Reclassification of stranded tax effects due to adoption of accounting principle	[1]				(829)
Adjusted beginning balance						$ (5,868)
Current period other comprehensive income (loss):
Other comprehensive income (loss) before reclassifications		(3,477)	(3,380)	(3,387)	(1,357)
Amounts reclassified from accumulated other comprehensive (loss) income		(149)	(180)	(306)	(300)
Effect of taxes	[2]	773	243	1,123	(51)
Total current period other comprehensive (loss) income		(2,853)	(3,317)	(2,570)	(1,708)
Balance		$ (15,121)	$ (7,576)	$ (15,121)	$ (7,576)
[1]	The Company has adjusted the balance at December 31, 2017 of accumulated other comprehensive loss for the stranded tax effects caused by the enactment of the Tax Cuts and Jobs Act of 2017 (the “Tax Act”).
[2]	The Company’s effective tax rate for the three months ended June 30, 2019 and 2018 was 26.2% and 26.6%, respectively, and 22.9% and 24.7% for the six months ended June 30, 2019 and 2018, 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 be ing 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.
[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 August 31, 2023.
[5]	The fair value of the fixed interest rate swap is included in other liabilities on the June 30, 2019 consolidated balance sheet.

Other Comprehensive Income (L_4

Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss - Components of Accumulated Other Comprehensive Loss (Parenthetical) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract]
Effective tax rate	26.20%	26.60%	22.90%	24.70%

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Changes in Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Balance	$ 662,571	$ 622,501	$ 660,417	$ 616,030
Net income	14,611	13,617	29,929	26,034
Other comprehensive income	(2,853)	(3,317)	(2,570)	(1,708)
Equity compensation	3,714	2,959	7,865	5,350
Exercise of stock options	25	1,733	429	3,533
Issuance of shares pursuant to vesting of restricted stock units			1
Net payments for stock issuances and buybacks	(8,789)	512	(24,158)	(8,597)
Dividends declared	(2,642)	(2,634)	(5,276)	(5,271)
Balance	666,637	635,371	666,637	635,371
Common Stock
Balance	$ 23	$ 22	$ 22	$ 22
Balance (in shares)	18,866	18,767	18,817	18,662
Exercise of stock options (in shares)	1	49	12	125
Issuance of shares pursuant to vesting of restricted stock units			$ 1
Issuance of shares pursuant to vesting of restricted stock units (in shares)	8	3	263	190
Net payments for stock issuances and buybacks (in shares)	(117)	7	(334)	(151)
Balance	$ 23	$ 22	$ 23	$ 22
Balance (in shares)	18,758	18,826	18,758	18,826
Additional Paid-in Capital
Balance	$ 330,763	$ 311,941	$ 326,208	$ 307,821
Equity compensation	3,714	2,895	7,865	5,215
Exercise of stock options	25	1,733	429	3,533
Net payments for stock issuances and buybacks	843	444	843	444
Balance	335,345	317,013	335,345	317,013
Retained Earnings
Balance	499,126	445,375	486,442	434,766
Net income	14,611	13,617	29,929	26,034
Reclassification of stranded tax effects due to adoption of accounting principle				829
Dividends declared	(2,642)	(2,634)	(5,276)	(5,271)
Balance	511,095	456,358	511,095	456,358
Treasury Stock
Balance	$ (155,073)	$ (130,578)	$ (139,704)	$ (121,540)
Balance (in shares)	3,846	3,512	3,629	3,357
Equity compensation		$ 64		$ 135
Issuance of shares pursuant to vesting of restricted stock units (in shares)		(3)		(6)
Net payments for stock issuances and buybacks	$ (9,632)	$ 68	$ (25,001)	$ (9,041)
Net payments for stock issuances and buybacks (in shares)	129	(7)	346	151
Balance	$ (164,705)	$ (130,446)	$ (164,705)	$ (130,446)
Balance (in shares)	3,975	3,502	3,975	3,502
Accumulated Other Comprehensive Loss
Balance	$ (12,268)	$ (4,259)	$ (12,551)	$ (5,039)
Other comprehensive income	(2,853)	(3,317)	(2,570)	(1,708)
Reclassification of stranded tax effects due to adoption of accounting principle				(829)
Balance	$ (15,121)	$ (7,576)	$ (15,121)	$ (7,576)

Restricted Cash - Reconciliatio

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		Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents		$ 6,304	$ 11,694	$ 6,322	$ 11,809
Restricted cash - current	[1]				11,191
Restricted cash - non-current			1,292	1,279	1,266
Total of cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows		$ 6,304	$ 12,986	$ 7,601	$ 24,266
[1]	Restricted cash – current at the beginning of 2018 represents an amount held in an escrow account for a business acquisition.

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregation of Revenue (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 366,717,000	$ 324,315,000	$ 707,971,000	$ 627,095,000
Fixed-Price
Disaggregation Of Revenue [Line Items]
Revenue from clients	146,516,000	136,220,000	280,119,000	258,609,000
Time-and-Materials
Disaggregation Of Revenue [Line Items]
Revenue from clients	167,457,000	128,103,000	323,459,000	252,290,000
Cost-Based
Disaggregation Of Revenue [Line Items]
Revenue from clients	52,744,000	59,992,000	104,393,000	116,196,000
U.S. Federal Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	141,193,000	139,517,000	273,363,000	273,750,000
U.S. State and Local Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	72,893,000	34,532,000	138,400,000	65,889,000
International Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	31,652,000	34,615,000	58,865,000	63,383,000
Total Government
Disaggregation Of Revenue [Line Items]
Revenue from clients	245,738,000	208,664,000	470,628,000	403,022,000
Commercial
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 120,979,000	$ 115,651,000	$ 237,343,000	$ 224,073,000
Customer Concentration Risk | Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	100.00%	100.00%	100.00%	100.00%
Customer Concentration Risk | Revenue from Contract with Customer | Fixed-Price
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	40.00%	42.00%	40.00%	41.00%
Customer Concentration Risk | Revenue from Contract with Customer | Time-and-Materials
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	46.00%	39.00%	46.00%	40.00%
Customer Concentration Risk | Revenue from Contract with Customer | Cost-Based
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	14.00%	19.00%	14.00%	19.00%
Customer Concentration Risk | Revenue from Contract with Customer | U.S. Federal Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	38.00%	43.00%	39.00%	44.00%
Customer Concentration Risk | Revenue from Contract with Customer | U.S. State and Local Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	20.00%	11.00%	19.00%	10.00%
Customer Concentration Risk | Revenue from Contract with Customer | International Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	9.00%	11.00%	8.00%	10.00%
Customer Concentration Risk | Revenue from Contract with Customer | Total Government
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	67.00%	65.00%	66.00%	64.00%
Customer Concentration Risk | Revenue from Contract with Customer | Commercial
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	33.00%	35.00%	34.00%	36.00%
Energy Environmental And Infrastructure
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 166,998,000	$ 133,276,000	$ 320,988,000	$ 257,526,000
Energy Environmental And Infrastructure | Customer Concentration Risk | Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	46.00%	41.00%	46.00%	41.00%
Health Education And Social Programs
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 133,919,000	$ 131,141,000	$ 255,057,000	$ 254,069,000
Health Education And Social Programs | Customer Concentration Risk | Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	36.00%	41.00%	36.00%	41.00%
Safety And Security
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 29,818,000	$ 27,491,000	$ 59,047,000	$ 52,966,000
Safety And Security | Customer Concentration Risk | Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	8.00%	8.00%	8.00%	8.00%
Consumer And Financial Services
Disaggregation Of Revenue [Line Items]
Revenue from clients	$ 35,982,000	$ 32,407,000	$ 72,879,000	$ 62,534,000
Consumer And Financial Services | Customer Concentration Risk | Revenue from Contract with Customer
Disaggregation Of Revenue [Line Items]
Revenue from clients, Percent	10.00%	10.00%	10.00%	10.00%

Revenue Recognition - Additiona

Revenue Recognition - Additional Information (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Disaggregation Of Revenue [Abstract]
Net contract assets (liabilities)	$ 15,331

Revenue Recognition - Schedule

Revenue Recognition - Schedule of Changes in Contract Balances Due to Adoption of New Accounting Standards (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Contract assets	$ 141,960	$ 126,688
Contract liabilities	(33,435)	(33,494)
Net contract assets (liabilities)	108,525	$ 93,194
Change in contract assets	15,272
Change in contract liabilities	59
Change in net contract assets (liabilities)	$ 15,331
Percentage of change in contract assets	12.10%
Percentage of change in contract liabilities	(0.20%)
Percentage of change in net contract assets (liabilities)	16.50%

Revenue Recognition - Additio_2

Revenue Recognition - Additional Information (Detail1) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-07-01 $ in Billions	Jun. 30, 2019USD ($)
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

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2017
Income Taxes [Line Items]
Effective income tax rate reconciliation, percent	26.20%	26.60%	22.90%	24.70%
Unrecognized tax benefits	$ 0.2		$ 0.2
Unrecognized tax benefits that would impact effective tax rate	$ 0.2		$ 0.2
Federal corporate income tax rate			21.00%		35.00%
Internal Revenue Service (IRS) | Earliest Tax Year
Income Taxes [Line Items]
Open tax year			2015
Internal Revenue Service (IRS) | Latest Tax Year
Income Taxes [Line Items]
Open tax year			2017
State Local and Foreign Jurisdictions | Earliest Tax Year
Income Taxes [Line Items]
Open tax year			2014
State Local and Foreign Jurisdictions | Latest Tax Year
Income Taxes [Line Items]
Open tax year			2017

Accounting for Stock Compensa_2

Accounting for Stock Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	Apr. 04, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Allocated share-based compensation expense		$ 5.9	$ 5.4	$ 12.6	$ 10.2
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				139,633
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value				$ 76.56
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized		18.8		$ 18.8
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition				2 years
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				97,633
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value				$ 76.56
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized		15.9		$ 15.9
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition				1 year 8 months 12 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				47,290
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value				$ 82.38
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized		$ 6.1		$ 6.1
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition				1 year 4 months 24 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			340,134
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		914,603		914,603

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Antidilutive securities excluded from computation of earnings per share, amount	0	0	1,743	12,415
Performance Shares | Initial Performance Vesting Period
Share-based compensation arrangement by share-based payment award, award vesting period			2 years

Earnings Per Share - Schedule o

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		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share [Abstract]
Net Income	$ 14,611	$ 13,617	$ 29,929	$ 26,034
Weighted-average number of basic shares outstanding during the period	18,805	18,806	18,815	18,738
Dilutive effect of stock options, RSUs, and performance shares	328	403	398	470
Weighted-average number of diluted shares outstanding during the period	19,133	19,209	19,213	19,208
Basic earnings per share	$ 0.78	$ 0.72	$ 1.59	$ 1.39
Diluted earnings per share	$ 0.76	$ 0.71	$ 1.56	$ 1.36

Share Repurchase Program - Addi

Share Repurchase Program - Additional Information (Details)	Jun. 30, 2019USD ($)
Equity [Abstract]
Stock repurchase program, authorized amount	$ 100,000,000
Line of credit facility, condition permited for unlimited share repurchases, leverage ratio	3.25
Stock repurchase program, remaining authorized repurchase amount	$ 68,000,000

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - Subsequent Event	Aug. 01, 2019$ / shares
Subsequent Event [Line Items]
Dividend declaration date	Aug. 1, 2019
Cash dividend per share	$ 0.14
Dividend payment date	Oct. 15, 2019
Dividend close of record date	Sep. 13, 2019

Contingencies - Additional Info

Contingencies - Additional Information (Details) - USD ($) $ in Millions	Jun. 10, 2016	Jun. 30, 2019
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