CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 231,817	$ 190,523
Adjustments to reconcile net income to net cash provided by operating activities-
Amortization of identifiable intangible assets	32,273	36,602
Depreciation expense	27,717	24,643
Change in right-of-use assets	19,630	15,873
Bad debt expense	2,849	1,471
Deferred tax provision	116,355	11,578
Amortization of debt financing costs	512	613
Gain on sale of assets	(1,683)	(1,112)
Changes in the fair value of contingent earn-out obligations	14,207	(530)
Stock-based compensation	9,128	7,479
(Increase) decrease in-
Receivables, net	(376,282)	(275,848)
Inventories	(18,272)	(16,335)
Prepaid expenses and other current assets	2,504	1,513
Costs and estimated earnings in excess of billings and unbilled accounts receivable	(5,326)	(17,180)
Other noncurrent assets	(247)	(86)
Increase (decrease) in-
Accounts payable and accrued liabilities	185,382	89,701
Billings in excess of costs and estimated earnings and deferred revenue	217,148	112,482
Other long-term liabilities	8,848	(11,863)
Net cash provided by operating activities	466,560	169,524
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(69,574)	(34,793)
Proceeds from sales of property and equipment	5,093	2,151
Cash paid for acquisitions, net of cash acquired	(53,404)	(48,507)
Payments for investments	(1,240)	(1,610)
Net cash used in investing activities	(119,125)	(82,759)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility	285,000	495,000
Payments on revolving credit facility	(500,000)	(380,000)
Payments on term loan		(120,000)
Payments on other debt	(1,980)	(7,834)
Payments on finance lease liabilities		(820)
Debt financing costs		(2,297)
Payments of dividends to stockholders	(21,455)	(14,712)
Share repurchase	(8,563)	(36,427)
Shares received in lieu of tax withholding	(4,725)	(3,247)
Proceeds from exercise of options	18	944
Deferred acquisition payments		(50)
Payments for contingent consideration arrangements	(15,321)	(4,959)
Net cash used in financing activities	(267,026)	(74,402)
NET INCREASE IN CASH AND CASH EQUIVALENTS	80,409	12,363
CASH AND CASH EQUIVALENTS, beginning of period	57,214	58,776
CASH AND CASH EQUIVALENTS, end of period	$ 137,623	$ 71,139