CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net (loss) income	$ (4,831)	$ 94,032	$ 21,655
Adjustments to reconcile net (loss) income to net cash provided by operating activities
Depreciation expense	20,963	15,457	12,457
Amortization of intangible assets	3,626	0	1,310
Amortization of deferred loan costs	2,525	2,277	1,303
Amortization of original issue discount	244	257	57
Amortization of inventory step-up charges	10,285	0	0
Deferred income taxes	(5,892)	(70,492)	0
Non-cash stock compensation expense	2,749	3,410	2,425
Impairment of assets held for sale	0	134	73
Gain on sale of property, equipment and real estate	(497)	(804)	(772)
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(24,061)	(6,299)	(10,680)
Inventories, net	(16,452)	(15,927)	(14,028)
Costs in excess of billings on uncompleted contracts	(4,026)	276	(1,554)
Other current assets	(9,378)	(9,163)	(3,743)
Other long-term assets	1,240	(1,688)	453
Accounts payable	873	9,666	3,777
Accrued expenses and other liabilities	4,377	1,633	18,810
Billings in excess of costs on uncompleted contracts	8,360	1,776	(343)
Interest on subordinate note	0	0	(16,840)
Insurance deductible reserves	7,973	6,165	997
Other long-term liabilities	2,665	22	0
Net cash provided by operating activities	743	30,732	15,357
Cash flows from investing activities
Change in restricted assets	36,106	10,326	(46,432)
Cash acquired in the Merger	6,342	0	0
Purchases of businesses, net of cash acquired	(149,485)	(236)	(6,705)
Purchases of property, equipment and real estate	(31,319)	(28,275)	(15,057)
Proceeds from sale of property, equipment and real estate	3,280	1,919	4,554
Other investing activities	0	4	(359)
Net cash used in investing activities	(135,076)	(16,262)	(63,999)
Cash flows from financing activities
Proceeds from revolving line of credit	293,183	0	338,618
Repayments of proceeds from revolving line of credit	(208,637)	0	(378,618)
Proceeds from notes, net of original issue discount	0	0	248,778
Principal payments on subordinate term note	0	0	(102,825)
Borrowings under other notes	2,491	9,991	3,660
Principal payments on other notes	(6,081)	(5,999)	(2,415)
Secured borrowings	767	0	0
Tax benefits related to stock based compensation	0	1,014	2,553
Purchase of treasury stock	(1,454)	(1,607)	(461)
Payments for debt issuance costs	(3,567)	(10)	(10,785)
Payments on capital lease obligations	(4,542)	(3,813)	(2,407)
Net cash provided by (used in) financing activities	72,160	(424)	96,098
Net (decrease) increase in cash and cash equivalents	(62,173)	14,046	47,456
Cash and cash equivalents
Beginning of period	63,262	49,216	1,760
End of period	1,089	63,262	49,216
Supplemental disclosure of cash flow information
Interest paid	23,970	24,351	27,859
Cash paid (received) for income taxes, net	4,310	12,917	1,025
Non-cash investing and financing transactions
Accrued purchases of property and equipment	1,968	0	0
Assets acquired under capital lease obligations	$ 2,342	3,929	9,966
Consideration transferred in connection with the Merger		$ 0	$ 0