CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net income (loss)	$ 30,880	$ (4,831)	$ 94,032
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation expense	47,959	20,963	15,457
Amortization of intangible assets	20,721	3,626	0
Amortization of debt issuance costs	3,114	2,525	2,277
Amortization of original issue discount	174	244	257
Amortization of inventory step-up charges	2,884	10,285	0
Amortization of favorable and unfavorable leases	(76)	0	0
Deferred income taxes	(3,571)	(5,892)	(70,492)
Non-cash stock compensation expense	7,252	2,749	3,410
Impairment of assets	11,928	0	134
Gain on sale of property, equipment and real estate	(1,396)	(497)	(804)
Gain on insurance proceeds	(1,003)	0	0
Loss on debt extinguishment	12,529	0	0
Change in assets and liabilities, net of effects of acquisitions
Accounts receivable, net of allowances	(10,128)	(24,061)	(6,299)
Inventories, net	(31,200)	(16,452)	(15,927)
Costs in excess of billings on uncompleted contracts	(3,845)	(4,026)	276
Current income taxes receivable/payable	9,627	(8,176)	0
Other current assets	(12,208)	(1,202)	(9,163)
Other long-term assets	(126)	1,240	(1,688)
Accounts payable	28,592	873	9,666
Accrued expenses and other liabilities	(5,859)	4,377	1,633
Billings in excess of costs on uncompleted contracts	(197)	8,360	1,776
Insurance reserves	(16)	7,973	6,165
Other long-term liabilities	853	2,665	22
Net cash provided by operating activities	106,888	743	30,732
Cash flows from investing activities
Purchases of property, equipment and real estate	(38,067)	(31,319)	(28,275)
Proceeds from sale of property, equipment and real estate	3,187	3,280	1,919
Insurance proceeds	1,151	0	0
Change in restricted assets	0	36,106	10,326
Cash acquired in the Merger	0	6,342	0
Purchases of businesses, net of cash acquired	0	(149,485)	(236)
Other investing activities	0	0	4
Net cash used in investing activities	(33,729)	(135,076)	(16,262)
Cash flows from financing activities
Proceeds from revolving line of credit	1,544,064	293,183	0
Repayments of proceeds from revolving line of credit	(1,696,324)	(208,637)	0
Proceeds from issuance of Senior Notes	350,000	0	0
Redemption of Extinguished Senior Notes	250,000	0	0
Borrowings under other notes	0	2,491	9,991
Principal payments on other notes	(3,303)	(6,081)	(5,999)
Secured borrowings	1,427	767	0
Proceeds from issuance of common stock, net of offering costs	13,776	0	0
Proceeds from exercise of stock options	1,301	0	0
Tax benefits related to stock based compensation	0	0	1,014
Purchase of treasury stock	(2,023)	(1,454)	(1,607)
Payments of debt issuance costs	(7,011)	(3,567)	(10)
Payments of debt extinguishment costs	(8,438)	0	0
Payments on capital lease obligations	(8,800)	(4,542)	(3,813)
Net cash (used in) provided by financing activities	(65,331)	72,160	(424)
Net increase (decrease) in cash and cash equivalents	7,828	(62,173)	14,046
Cash and cash equivalents
Beginning of period	1,089	63,262	49,216
End of period	8,917	1,089	63,262
Supplemental disclosure of cash flow information
Interest paid	28,081	23,970	24,351
Cash paid for income taxes, net	8,210	4,310	12,917
Non-cash investing and financing transactions
Accrued purchases of property and equipment	505	1,968	0
Assets acquired under capital lease obligations	15,089	2,342	3,929
Consideration transferred in connection with the Merger	$ 0	$ 453,390	$ 0