Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income (loss)	$ (62,262)	$ 4,147
Adjustments to reconcile net income (loss) to net cash provided by operations:
Impairments and other non-cash charges	13,024	0
Depreciation and amortization	34,186	34,891
Stock-based compensation expense	4,869	9,375
Provision for deferred income taxes	(19,023)	(787)
Credit loss expense	1,304	1,044
Gain on sale of assets	(2,916)	(5,779)
Gain on extinguishment of debt	(419)	0
Amortization of original issue discount and debt issuance costs	3,962	4,589
Change in assets and liabilities:
Decrease in receivables	77,004	17,065
Decrease in inventories	26,566	11,873
Increase in other assets	(2,912)	(3,621)
Decrease in accounts payable	(34,606)	(11,806)
Increase (decrease) in accrued liabilities and other	1,516	(7,805)
Net cash provided by operating activities	40,293	53,186
Cash flows from investing activities:
Capital expenditures	(14,609)	(35,803)
Proceeds from sale of property, plant and equipment	10,497	7,116
Net cash used in investing activities	(4,112)	(28,687)
Cash flows from financing activities:
Borrowings on lines of credit	147,987	237,093
Payments on lines of credit	(180,440)	(242,263)
Purchases of Convertible Notes	(29,124)	0
Debt issuance costs	0	(1,214)
Proceeds from employee stock plans	0	1,236
Purchases of treasury stock	(332)	(21,678)
Other financing activities	1,029	1,336
Net cash used in financing activities	(60,880)	(25,490)
Effect of exchange rate changes on cash	(1,810)	(1,526)
Net decrease in cash, cash equivalents, and restricted cash	(26,509)	(2,517)
Cash, cash equivalents, and restricted cash at beginning of period	56,863	64,266
Cash, cash equivalents, and restricted cash at end of period	$ 30,354	$ 61,749