CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ 5,189	$ (4,221)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	14,723	5,430
Amortization of intangible assets	22,700	14,464
Amortization of debt issuance costs and debt discount	4,844	1,707
Inventory fair value purchase accounting adjustment	664	1,635
Provision for doubtful accounts	766	1,132
Stock-based compensation	1,765	0
Unrealized gain on derivative instruments, net	(13,155)	0
Loss on disposal of property and equipment	242	110
Deferred income taxes	3,356	(1,875)
Change in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(32,706)	(15,248)
Other receivables	10,638	3,982
Inventories	(2,807)	(12,378)
Prepaid expenses and other current assets	561	403
Other assets	393	197
Accounts payable	17,875	26,959
Accrued payroll and employee benefits	(4,433)	(1,468)
Accrued taxes	(1,474)	1,031
Other liabilities	(7,258)	(3,087)
Net cash provided by operating activities	21,883	18,773
Cash flows from investing activities:
Purchases of property and equipment	(17,525)	(7,763)
Payment of net working capital adjustments	(405)	0
Proceeds from net working capital adjustments	8,554	0
Proceeds from the disposal of fixed assets	429	0
Acquisitions, net of cash acquired	(52,951)	(57,942)
Net cash used in investing activities	(61,898)	(65,705)
Cash flows from financing activities:
Proceeds from asset-based revolving credit facility	280,995	15,000
Repayments of asset-based revolving credit facility	(415,497)	(30,000)
Principal borrowings on long-term debt	0	67,200
Principal payments on long-term debt	0	(1,400)
Debt issuance costs	0	(1,281)
Principal repayment of capital lease obligations	(1,395)	0
Issuance of common stock	163,952	0
Capital contributions	2,997	0
Capital distributions	0	(17)
Net cash provided by financing activities	31,052	49,502
Effect of exchange rate changes on cash	357	0
Net (decrease) increase in cash	(8,606)	2,570
Cash and cash equivalents at beginning of period	28,552	10,662
Cash and cash equivalents at end of period	19,946	13,232
Supplemental disclosures of cash flow information:
Cash paid for income taxes	143	1,610
Cash paid for interest	25,699	14,582
Supplemental disclosures of non-cash investing and financing activities:
Change in fair value of derivatives, net of tax	1,400	0
Assets acquired under capital lease	658	0
Goodwill adjustment for purchase price allocation	1,724	0
Tax receivable agreement	203,837	0
Property and equipment included in accounts payable	$ 198	$ 0