CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 18,159	$ 4,347
Less: loss on sale of discontinued operations	(1,390)	0
Less: net income from discontinued operations	0	5,138
Net income (loss) from continuing operations	19,549	(791)
Adjustments to reconcile net income (loss) to net cash provided by operating activities from continuing operations:
Depreciation	17,558	15,627
Amortization of intangible assets	23,135	21,521
Amortization of debt issuance costs and debt discount	992	5,338
Inventory fair value purchase accounting adjustment	234	407
Provision for doubtful accounts	1,525	1,278
Stock-based compensation	1,939	878
Unrealized gain on derivative instruments, net	0	(134)
(Gain) loss on disposal of property and equipment	(67)	275
Right-of-use assets non-cash expense	13,601	0
Deferred income taxes	271	(421)
Change in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(43,441)	(53,444)
Other receivables	13,581	10,052
Inventories	(1,291)	(22,209)
Prepaid expenses and other current assets	(3,123)	(1,019)
Other assets	(121)	977
Accounts payable	23,429	15,061
Accrued payroll and employee benefits	(3,057)	5,136
Accrued taxes	(2,291)	3,216
Other liabilities	(9,219)	(1,049)
Net cash provided by operating activities from continuing operations	53,204	699
Cash flows from investing activities from continuing operations:
Purchases of property and equipment	(15,052)	(19,762)
Proceeds from termination of net investment hedge	3,313	0
Proceeds from net working capital adjustments related to acquisitions	470	296
Proceeds from the disposal of fixed assets	2,376	577
Acquisitions, net of cash acquired	(21,923)	(21,220)
Net cash used in investing activities from continuing operations	(30,816)	(40,109)
Cash flows from financing activities from continuing operations:
Proceeds from asset-based revolving credit facility	281,620	266,198
Repayments of asset-based revolving credit facility	(291,371)	(219,350)
Principal payments for term loan	(2,250)	0
Payment related to tax receivable agreement	(16,667)	0
Tax withholding payment related to net settlement of equity awards	(138)	(45)
Principal repayment of finance lease obligations	(1,319)	(1,358)
Net cash (used in) provided by financing activities from continuing operations	(30,125)	45,445
Net cash used in operating activities from discontinued operations	0	(10,038)
Net cash used in investing activities from discontinued operations	(1,390)	(701)
Net cash used in financing activities of discontinued operations	0	(131)
Net cash used in discontinued operations	(1,390)	(10,870)
Effect of exchange rate changes on cash	282	(183)
Net decrease in cash	(8,845)	(5,018)
Cash and cash equivalents at beginning of period	15,299	12,101
Cash and cash equivalents at end of period	6,454	7,083
Supplemental disclosures of cash flow information:
Cash paid for income taxes	5,091	1,423
Cash paid for interest	16,477	25,201
Supplemental disclosures of non-cash investing and financing activities:
Change in fair value of derivatives, net of tax	6,012	2,259
Goodwill adjustment for purchase price allocation	$ 57	$ 138