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	$ 522,433	$ 323,398	$ 245,947
Adjustments to reconcile net income to net cash provided by operating activities-
Amortization of identifiable intangible assets	97,266	43,404	47,795
Depreciation expense	48,219	38,162	33,552
Change in right-of-use assets	30,950	25,964	21,557
Bad debt expense	6,952	4,944	2,670
Deferred tax provision (benefit)	(66,613)	95,296	(94,505)
Amortization of debt financing costs	687	685	786
Gain on sale of assets	(3,030)	(2,302)	(1,585)
Changes in the fair value of contingent earn-out obligations	88,146	23,607	4,819
Stock-based compensation	16,646	12,939	10,532
(Increase) decrease in-
Receivables, net	(333,233)	(381,555)	(223,178)
Inventories	6,544	(29,688)	(13,495)
Prepaid expenses and other current assets	(7,868)	(11,137)	(26,238)
Costs and estimated earnings in excess of billings and unbilled accounts receivable	(82,081)	7,350	(9,643)
Other noncurrent assets	(2,220)	(152)	(995)
Increase (decrease) in-
Accounts payable and other current liabilities	502,888	136,467	93,110
Billings in excess of costs and estimated earnings and deferred revenue	32,173	349,166	226,019
Other long-term liabilities	(8,802)	3,020	(15,617)
Net cash provided by operating activities	849,057	639,568	301,531
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(111,071)	(94,838)	(48,359)
Proceeds from sales of property and equipment	5,538	5,951	2,858
Cash paid for acquisitions, net of cash acquired	(235,466)	(102,261)	(49,217)
Payments for investments	(2,510)	(1,860)	(2,460)
Net cash used in investing activities	(343,509)	(193,008)	(97,178)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility	182,000	285,000	555,000
Payments on revolving credit facility	(182,000)	(500,000)	(560,000)
Payments on term loan			(120,000)
Proceeds from other debt	640
Payments on other debt	(26,576)	(12,033)	(12,256)
Payments on finance lease liabilities			(899)
Debt financing costs			(2,297)
Payments of dividends to stockholders	(42,766)	(30,379)	(20,077)
Share repurchases	(57,912)	(21,184)	(38,216)
Shares received in lieu of tax withholding	(8,915)	(4,725)	(3,247)
Proceeds from exercise of options	184	18	1,086
Deferred acquisition payments	(50)		(50)
Payments for contingent consideration arrangements	(25,364)	(15,321)	(4,959)
Net cash used in financing activities	(160,759)	(298,624)	(205,915)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	344,789	147,936	(1,562)
CASH AND CASH EQUIVALENTS, beginning of period	205,150	57,214	58,776
CASH AND CASH EQUIVALENTS, end of period	$ 549,939	$ 205,150	$ 57,214