CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 24,233	$ 18,159
Less: loss on sale of discontinued operations	0	(1,390)
Net income from continuing operations	24,233	19,549
Adjustments to reconcile net income to net cash provided by operating activities from continuing operations:
Depreciation	14,598	17,558
Amortization of intangible assets	23,909	23,135
Amortization of debt issuance costs and debt discount	1,080	992
Inventory fair value purchase accounting adjustment	0	234
Provision for expected credit losses	1,366	1,525
Stock-based compensation	2,828	1,939
Loss (gain) on disposal or sale of assets	708	(67)
Right-of-use assets non-cash expense	15,057	13,601
Deferred income taxes	3,334	271
Change in assets and liabilities, net of effects of acquisitions:
Accounts receivable	208	(43,441)
Other receivables	23,435	13,581
Inventories	20,053	(1,291)
Prepaid expenses and other current assets	(1,472)	(3,123)
Other assets	(6)	(121)
Accounts payable	1,333	23,429
Accrued payroll and employee benefits	(5,802)	(3,057)
Accrued taxes	827	(2,291)
Operating lease liabilities	(14,752)	(13,345)
Other liabilities	4,365	4,126
Net cash provided by operating activities from continuing operations	115,302	53,204
Cash flows from investing activities from continuing operations:
Purchases of property and equipment	(13,263)	(15,052)
Proceeds from termination of net investment hedge	0	3,313
Net (payments of) proceeds from net working capital adjustments related to acquisitions	(34)	470
Proceeds from disposal or sale of assets	980	2,376
Acquisitions, net of cash acquired	(8,638)	(21,923)
Net cash used in investing activities from continuing operations	(20,955)	(30,816)
Cash flows from financing activities from continuing operations:
Proceeds from asset-based revolving credit facility	322,500	281,620
Repayments of asset-based revolving credit facility	(371,500)	(291,371)
Principal payments for term loan	(2,250)	(2,250)
Payment related to tax receivable agreement	(27,850)	(16,667)
Tax withholding payment related to net settlement of equity awards	(370)	(138)
Principal repayment of finance lease liabilities	(1,355)	(1,319)
Net cash used in financing activities from continuing operations	(80,825)	(30,125)
Net cash used in investing activities from discontinued operations	0	(1,390)
Net cash used in discontinued operations	0	(1,390)
Effect of exchange rate changes on cash	(166)	282
Net increase (decrease) in cash	13,356	(8,845)
Cash and cash equivalents at beginning of period	17,766	15,299
Cash and cash equivalents at end of period	31,122	6,454
Supplemental disclosures of cash flow information:
Cash paid for income taxes	190	5,091
Cash paid for interest	14,186	16,477
Supplemental disclosures of non-cash investing and financing activities:
Decrease in fair value of derivatives, net of tax	1,525	6,012
Net goodwill increase for purchase price allocation	$ 47	$ 57