CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income including noncontrolling interests	$ 9,755	$ 6,889
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Amortization of identifiable intangible assets	2,039	1,831
Depreciation expense	4,219	3,792
Bad debt expense	(262)	211
Deferred tax benefit	(1,022)	(1,241)
Amortization of debt financing costs	85	93
Gain on sale of assets	(145)	(176)
Stock-based compensation expense	1,476	1,388
(Increase) decrease in-
Receivables, net	17,142	2,854
Inventories	(370)	(1,263)
Prepaid expenses and other current assets	(179)	735
Costs and estimated earnings in excess of billings	(1,837)	(3,592)
Other noncurrent assets	49	278
Increase (decrease) in-
Accounts payable and accrued liabilities	(9,316)	3,721
Billings in excess of costs and estimated earnings	(8,526)	4,817
Other long-term liabilities	(86)	78
Net cash provided by operating activities	13,022	20,415
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(3,765)	(3,623)
Proceeds from sales of property and equipment	220	206
Cash paid for acquisitions, net of cash acquired	(57,071)	(5,350)
Net cash used in investing activities	(60,616)	(8,767)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from revolving line of credit	132,000	14,500
Payments on revolving line of credit	(91,000)	(17,000)
Payments on other debt	(17)
Payments on capital lease obligations	(66)	(84)
Debt financing costs	(789)
Payments of dividends to shareholders	(2,426)	(2,237)
Share repurchase program	(2,840)
Shares received in lieu of tax withholding	(562)
Excess tax benefit of stock-based compensation	95	90
Proceeds from exercise of options	275	297
Distributions to noncontrolling interests		(41)
Payments for contingent consideration arrangements		(345)
Net cash provided by (used in) financing activities	34,670	(4,820)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(12,924)	6,828
CASH AND CASH EQUIVALENTS, beginning of period	56,464	32,064
CASH AND CASH EQUIVALENTS, end of period	$ 43,540	$ 38,892