CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 7,477	$ 9,841
Adjustments to reconcile net income to net cash provided by operating activities
Amortization of identifiable intangible assets	1,562	2,039
Depreciation expense	4,577	4,219
Goodwill impairment	1,105
Bad debt expense (benefit)	219	(262)
Deferred tax expense (benefit)	(1,077)	(1,022)
Amortization of debt financing costs	94	85
Gain on sale of assets	(154)	(145)
Changes in the fair value of contingent earn-out obligations	26
Stock-based compensation	1,333	1,485
(Increase) decrease in-
Receivables, net	24,525	17,142
Inventories	(750)	(370)
Prepaid expenses and other current assets	659	(179)
Costs and estimated earnings in excess of billings	(6,605)	(1,837)
Other noncurrent assets	465	49
Increase (decrease) in-
Accounts payable and accrued liabilities	(16,299)	(9,316)
Billings in excess of costs and estimated earnings	(7,151)	(8,526)
Other long-term liabilities	47	(86)
Net cash provided by operating activities	10,053	13,117
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(5,077)	(3,765)
Proceeds from sales of property and equipment	292	220
Cash paid for acquisitions, net of cash acquired	(313)	(57,071)
Net cash used in investing activities	(5,098)	(60,616)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving line of credit		132,000
Payments on revolving line of credit		(91,000)
Payments on other debt	(25)	(17)
Payments on capital lease obligations	(57)	(66)
Debt financing costs		(789)
Payments of dividends to stockholders	(2,608)	(2,426)
Share repurchase	(2,197)	(2,840)
Shares received in lieu of tax withholding	(632)	(562)
Proceeds from exercise of options	736	275
Deferred acquisition payments	(802)
Net cash provided by (used in) financing activities	(5,585)	34,575
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(630)	(12,924)
CASH AND CASH EQUIVALENTS, beginning of period	32,074	56,464
CASH AND CASH EQUIVALENTS, end of period	$ 31,444	$ 43,540