Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash Flows from Operating Activities
Net income	$ 110,170	$ 82,612	$ 64,243
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses	1,673	1,164	248
Deferred income taxes and unrecognized income tax benefits	(24,336)	(17,634)	7,428
Non-cash equity compensation	16,722	14,861	13,171
Depreciation and amortization	53,476	60,738	49,917
Gain on divestiture of a business	(2,009)	(7,590)
Other operating, net	4,647	8,294	10,683
Changes in operating assets and liabilities, net of the effect of acquisitions:
Net contract assets and liabilities	14,668	(38,422)	(41,634)
Contract receivables	(49,538)	20,939	19,732
Prepaid expenses and other assets	3,496	18,579	(20,737)
Operating lease assets and liabilities, net	(4,755)	3,544	(1,466)
Accounts payable	24,152	(1,489)	30,003
Accrued salaries and benefits	18,048	2,175	(3,337)
Accrued subcontractors and other direct costs	4,353	(269)	6,965
Accrued expenses and other current liabilities	8,361	(4,757)	24,742
Income tax receivable and payable	(5,391)	9,277	(1,526)
Other liabilities	(2,193)	361	3,774
Net Cash Provided by Operating Activities	171,544	152,383	162,206
Cash Flows from Investing Activities
Payments for purchase of property and equipment and capitalized software	(21,430)	(22,337)	(24,475)
Payments for business acquisitions, net of cash acquired	(55,007)	(32,664)	(237,280)
Proceeds from working capital adjustments related to prior business acquisition			2,911
Proceeds from divestiture of a business	1,985	51,328
Other investing, net	(353)
Net Cash Used in Investing Activities	(74,805)	(3,673)	(258,844)
Cash Flows from Financing Activities
Advances from working capital facilities	1,227,926	1,245,198	1,583,936
Payments on working capital facilities	(1,247,791)	(1,372,474)	(1,446,125)
Proceeds from other short-term borrowings	62,080	48,532
Repayments of other short-term borrowings	(66,408)	(41,653)
Receipt of restricted contract funds	1,251	7,672	15,721
Payment of restricted contract funds	(3,267)	(8,084)	(25,959)
Dividends paid	(10,507)	(10,537)	(10,547)
Net payments for stockholder issuances and share repurchases	(47,767)	(19,083)	(21,218)
Other financing, net	(2,415)	(2,159)	(5,437)
Net Cash (Used in) Provided by Financing Activities	(86,898)	(152,588)	90,371
Effect of Exchange Rate Changes on Cash, Cash Equivalents, and Restricted Cash	(473)	359	(1,198)
Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	9,368	(3,519)	(7,465)
Cash, Cash Equivalents, and Restricted Cash, Beginning of Period	9,449	12,968	20,433
Cash, Cash Equivalents, and Restricted Cash, End of Period	18,817	9,449	12,968
Supplemental disclosure of cash flow information:
Interest	30,046	34,093	22,782
Income taxes	$ 60,221	26,190	16,476
Non-cash investing and financing transactions:
Tenant improvements funded by lessor		568	20,253
Acquisition of property and equipment through finance lease		$ 337	$ 18,319