CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 190,523	$ 105,753
Adjustments to reconcile net income to net cash provided by operating activities-
Amortization of identifiable intangible assets	36,602	28,934
Depreciation expense	24,643	21,066
Change in right-of-use assets	15,873	12,904
Bad debt expense (benefit)	1,471	(1,698)
Deferred tax provision	11,578	6,589
Amortization of debt financing costs	613	403
Gain on sale of assets	(1,112)	(1,021)
Changes in the fair value of contingent earn-out obligations	(530)	(4,523)
Stock-based compensation	7,479	7,378
(Increase) decrease in-
Receivables, net	(275,848)	(25,809)
Inventories	(16,335)	(6,248)
Prepaid expenses and other current assets	1,513	15,592
Costs and estimated earnings in excess of billings and unbilled accounts receivable	(17,180)	(8,698)
Other noncurrent assets	(86)	(1,248)
Increase (decrease) in-
Accounts payable and accrued liabilities	98,781	15,112
Billings in excess of costs and estimated earnings	103,402	257
Other long-term liabilities	(11,863)	(12,089)
Net cash provided by operating activities	169,524	152,654
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(34,793)	(15,864)
Proceeds from sales of property and equipment	2,151	1,802
Cash paid for acquisitions, net of cash acquired	(48,507)	(105,543)
Payments for investments	(1,610)
Net cash used in investing activities	(82,759)	(119,605)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility	495,000	160,000
Payments on revolving credit facility	(380,000)	(115,000)
Payments on term loan	(120,000)	(15,000)
Payments on other debt	(7,834)	(9,000)
Payments on finance lease liabilities	(820)	(207)
Debt financing costs	(2,297)
Payments of dividends to stockholders	(14,712)	(12,691)
Share repurchase	(36,427)	(25,531)
Shares received in lieu of tax withholding	(3,247)	(2,363)
Proceeds from exercise of options	944	3,449
Deferred acquisition payments	(50)	(400)
Payments for contingent consideration arrangements	(4,959)	(3,481)
Net cash used in financing activities	(74,402)	(20,224)
NET INCREASE IN CASH AND CASH EQUIVALENTS	12,363	12,825
CASH AND CASH EQUIVALENTS, beginning of period	58,776	54,896
CASH AND CASH EQUIVALENTS, end of period	$ 71,139	$ 67,721