Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net loss	$ (51,784)	$ (213,255)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	21,306	23,186
Amortization of deferred loan costs and debt discounts	4,154	4,191
Allowance for credit losses	965	1,122
Foreign currency loss	2,341	876
Deferred income taxes	(2,318)	(5,177)
Loss on asset disposal	309	447
Goodwill impairment charge	0	191,788
Non-cash compensation cost	4,468	2,946
Other, net	(2,451)	(2,226)
Changes in operating assets and liabilities:
Accounts receivable	(24,811)	36,033
Inventory	(743)	1,989
Prepaid expenses and other current assets	5,612	(3,750)
Accounts payable	3,379	4,023
Other accrued liabilities	4,484	(12,992)
Income taxes	290	(1,956)
Net cash (used in) provided by operating activities	(34,799)	27,245
Cash flows from investing activities:
Capital expenditures	(9,220)	(12,486)
Business acquisitions, net of cash acquired	0	(1,013)
Proceeds from disposal of assets	49	181
Other	0	54
Net cash used in investing activities	(9,171)	(13,264)
Cash flows from financing activities:
Payments for debt issuance costs	(2,326)	(1,841)
Taxes paid related to net share settlement of share-based awards	(102)	(349)
Other	(206)	(129)
Net cash provided by (used in) financing activities	37,666	(10,017)
Effect of exchange rate changes on cash and cash equivalents	73	(589)
Net (decrease) increase in cash and cash equivalents	(6,231)	3,375
Cash and cash equivalents at beginning of period	24,586	12,175
Cash and cash equivalents at end of period	18,355	15,550
Term Loan
Cash flows from financing activities:
Payments under credit facility	0	(2,500)
Revolving Credit Facility
Cash flows from financing activities:
Payments under credit facility	0	(5,198)
Letter of Credit | ABL Facility | Line of Credit
Cash flows from financing activities:
Proceeds from lines of credit	95,200	0
Borrowings under ABL Facility, net	49,300	0
Payments under credit facility	$ (104,200)	$ 0