CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 86,762	$ 26,491
Adjustments to reconcile net income to net cash provided by operating activities-
Amortization of identifiable intangible assets	12,791	8,925
Depreciation expense	8,046	7,051
Change in right-of-use assets	4,734	4,377
Bad debt expense (benefit)	25	(1,018)
Deferred tax provision (benefit)	2,328	(410)
Amortization of debt financing costs	133	133
Gain on sale of assets	(323)	(350)
Changes in the fair value of contingent earn-out obligations	(4,088)	(1,186)
Stock-based compensation	3,996	4,711
(Increase) decrease in-
Receivables, net	(52,701)	49,684
Inventories	(3,104)	(2,181)
Prepaid expenses and other current assets	(2,803)	(390)
Costs and estimated earnings in excess of billings and unbilled accounts receivable	2,562	6,840
Other noncurrent assets	181	(284)
Increase (decrease) in-
Accounts payable and accrued liabilities	1,899	(33,087)
Billings in excess of costs and estimated earnings	9,046	20,550
Other long-term liabilities	(5,755)	(5,209)
Net cash provided by operating activities	63,729	84,647
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(9,192)	(4,812)
Proceeds from sales of property and equipment	1,056	498
Cash paid for acquisitions, net of cash acquired	3	(10,716)
Payments for investments	(1,236)
Net cash used in investing activities	(9,369)	(15,030)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving credit facility	50,000	10,000
Payments on revolving credit facility	(10,000)	(70,000)
Payments on term loan	(7,500)	(7,500)
Payments on other debt	(7,797)
Payments on finance lease liabilities	(253)
Payments of dividends to stockholders	(4,673)	(4,163)
Share repurchase	(14,097)	(885)
Shares received in lieu of tax withholding	(1,399)	(854)
Proceeds from exercise of options		1,405
Deferred acquisition payments	(50)	(400)
Payments for contingent consideration arrangements	(1,752)
Net cash provided by (used in) financing activities	2,479	(72,397)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	56,839	(2,780)
CASH AND CASH EQUIVALENTS, beginning of period	58,776	54,896
CASH AND CASH EQUIVALENTS, end of period	$ 115,615	$ 52,116