Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income (loss)	$ (12,148)	$ 1,282
Adjustments to reconcile net income (loss) to net cash provided by operations:
Depreciation and amortization	11,453	11,438
Stock-based compensation expense	1,592	4,969
Provision for deferred income taxes	(2,801)	(438)
Credit loss expense	20	386
Gain on sale of assets	(1,033)	(2,339)
Loss on extinguishment of debt	915	0
Amortization of original issue discount and debt issuance costs	1,573	1,481
Change in assets and liabilities:
Decrease in receivables	10,652	5,300
Decrease in inventories	5,466	10,139
Increase in other assets	(644)	(273)
Decrease in accounts payable	(9,842)	(15,149)
Decrease in accrued liabilities and other	(815)	(14,527)
Net cash provided by operating activities	4,388	2,269
Cash flows from investing activities:
Capital expenditures	(6,649)	(17,467)
Proceeds from sale of property, plant and equipment	3,673	1,771
Net cash used in investing activities	(2,976)	(15,696)
Cash flows from financing activities:
Borrowings on lines of credit	74,909	80,656
Payments on lines of credit	(58,948)	(61,524)
Repayments of Convertible Debt	(13,775)	0
Debt issuance costs	0	(927)
Proceeds from employee stock plans	0	330
Purchases of treasury stock	(32)	(5,013)
Other financing activities	(1,218)	(1,169)
Net cash provided by financing activities	936	12,353
Effect of exchange rate changes on cash	(2,576)	(581)
Net decrease in cash, cash equivalents, and restricted cash	(228)	(1,655)
Cash, cash equivalents, and restricted cash at beginning of period	56,863	64,266
Cash, cash equivalents, and restricted cash at end of period	$ 56,635	$ 62,611