Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows (used in) provided by operating activities:
Net loss	$ (142,966)	$ (222,328)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	31,416	34,709
Amortization of deferred loan costs and debt discounts	6,388	6,493
Allowance for credit losses	1,985	1,160
Foreign currency losses	4,274	1,628
Deferred income taxes	5,083	(3,132)
Loss on asset disposals	17	938
Goodwill impairment charges	55,837	191,788
Non-cash compensation costs	5,576	4,073
Other, net	(3,629)	(3,248)
Changes in operating assets and liabilities:
Accounts receivable	(14,817)	22,147
Inventory	(334)	2,744
Prepaid expenses and other current assets	3,700	(6,000)
Accounts payable	6,012	4,718
Other accrued liabilities	5,321	(13,838)
Income taxes	276	(1,687)
Net cash (used in) provided by operating activities	(35,861)	20,165
Cash flows (used in) provided by investing activities:
Capital expenditures	(12,376)	(16,684)
Business acquisitions, net of cash acquired	0	(1,013)
Proceeds from disposal of assets	154	198
Other	0	(53)
Net cash used in investing activities	(12,222)	(17,552)
Cash flows (used in) provided by financing activities:
Payments for debt issuance costs	(2,899)	(1,841)
Taxes paid related to net share settlement of share-based awards	(102)	(350)
Other	(356)	(199)
Net cash provided by financing activities	41,743	4,662
Effect of exchange rate changes on cash and cash equivalents	(1,274)	161
Net (decrease) increase in cash and cash equivalents	(7,614)	7,436
Cash and cash equivalents at beginning of period	24,586	12,175
Cash and cash equivalents at end of period	16,972	19,611
Term Loan
Cash flows (used in) provided by financing activities:
Payments under credit facility	0	(3,750)
Revolving Credit Facility
Cash flows (used in) provided by financing activities:
Proceeds from lines of credit	0	10,802
Letter of Credit | ABL Facility | Line of Credit
Cash flows (used in) provided by financing activities:
Proceeds from lines of credit	124,700	0
Borrowings under ABL Facility, net	46,300	0
Payments under credit facility	$ (125,900)	$ 0