CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
CASH FLOW FROM OPERATING ACTIVITIES:
Net income	$ 16,818	$ 25,847
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	5,919	6,077
Amortization of intangible assets	10,667	11,237
Bad debt expense	917	978
Amortization of debt issuance costs	578	578
Compensation expense for restricted stock	1,557	1,732
Tax loss (benefit) related to vesting of restricted stock	10	(742)
Deferred income taxes	13	(1,925)
Changes in operating assets and liabilities, net of assets and liabilities acquired in business acquisitions:
Trade accounts receivable	41,632	(43,176)
Costs and estimated profits in excess of billings on uncompleted contracts	(5,983)	11,413
Inventories	6,069	2,632
Prepaid expenses and other assets	(3,164)	(2,581)
Accounts payable and accrued expenses	(20,691)	6,550
Billings in excess of costs and estimated profits on uncompleted contracts	(538)	1,147
Net cash provided by operating activities	53,804	19,767
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(6,516)	(4,700)
Sale of long-term investment	0	1,688
Acquisitions of businesses, net of cash acquired	(5,000)	(301,097)
Net cash used in investing activities	(11,516)	(304,109)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from debt	206,486	541,788
Principal payments on revolving line of credit and other long-term debt	(238,473)	(244,509)
Dividends paid	(45)	(45)
Purchase of treasury stock	(8,908)	(6,771)
Tax loss (benefit) related to vesting of restricted stock	(10)	742
Net cash provided by (used in) financing activities	(40,950)	291,205
EFFECT OF FOREIGN CURRENCY ON CASH	103	(239)
NET CHANGE IN CASH AND CASH EQUIVALENTS	1,441	6,624
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	47	5,469
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 1,488	$ 12,093