CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 80,272	$ 87,747
Adjustments to reconcile net income to net cash provided by operating activities-
Amortization of identifiable intangible assets	20,221	14,102
Depreciation expense	18,222	16,630
Change in right-of-use assets	10,552
Bad debt expense	2,093	2,905
Deferred tax provision (benefit)	(2,620)	5,520
Amortization of debt financing costs	287	288
Gain on sale of assets	(1,119)	(630)
Changes in the fair value of contingent earn-out obligations	3,924	(493)
Stock-based compensation	4,861	6,021
(Increase) decrease in-
Receivables, net	(31,647)	(80,726)
Inventories	(248)	(1,917)
Prepaid expenses and other current assets	(4,625)	3,085
Costs and estimated earnings in excess of billings and unbilled accounts receivable	(2,081)	(18,328)
Other noncurrent assets	(544)	(199)
Increase (decrease) in-
Accounts payable and accrued liabilities	6,635	19,537
Billings in excess of costs and estimated earnings	4,555	17,682
Other long-term liabilities	(9,023)	(3,222)
Net cash provided by operating activities	99,715	68,002
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(22,641)	(22,059)
Proceeds from sales of property and equipment	1,447	1,077
Proceeds from sale of business	1,611
Cash paid for acquisitions, net of cash acquired	(196,470)	(65,287)
Net cash used in investing activities	(216,053)	(86,269)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving line of credit	320,000	104,000
Payments on revolving line of credit	(177,000)	(79,000)
Payments on other debt	(3,254)	(1,094)
Debt financing costs		(844)
Payments of dividends to stockholders	(10,871)	(8,930)
Share repurchase	(15,317)	(11,573)
Shares received in lieu of tax withholding	(1,498)	(1,540)
Proceeds from exercise of options	1,001	2,899
Deferred acquisition payments	(637)	(750)
Payments for contingent consideration arrangements	(1,343)	(2,195)
Net cash provided by financing activities	111,081	973
NET DECREASE IN CASH AND CASH EQUIVALENTS	(5,257)	(17,294)
CASH AND CASH EQUIVALENTS, beginning of period	45,620	36,542
CASH AND CASH EQUIVALENTS, end of period	$ 40,363	$ 19,248

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