Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net loss	$ (25,526)	$ (80,696)	$ (12,946)
Adjustments to reconcile net loss to net cash provided by (used in) operations:
Impairments and other non-cash charges	0	25,072	11,422
Depreciation and amortization	42,225	45,314	47,144
Stock-based compensation expense	7,926	6,578	11,640
Provision for deferred income taxes	(1,209)	(18,850)	(4,250)
Credit loss expense	664	1,427	1,792
Gain on sale of assets	(7,182)	(6,531)	(10,801)
Gain on insurance recovery	(849)	0	0
(Gain) loss on extinguishment of debt	1,000	(419)	0
Amortization of original issue discount and debt issuance costs	3,707	5,152	6,188
Change in assets and liabilities:
(Increase) decrease in receivables	(61,283)	70,994	40,182
(Increase) decrease in inventories	(10,336)	39,889	699
Increase in other assets	(726)	(686)	(1,032)
Increase (decrease) in accounts payable	36,341	(29,457)	(8,318)
Increase (decrease) in accrued liabilities and other	12,235	(1,996)	(9,434)
Net cash provided by (used in) operating activities	(3,013)	55,791	72,286
Cash flows from investing activities:
Capital expenditures	(21,793)	(15,794)	(44,806)
Business acquisitions, net of cash acquired	(13,434)	0	(18,692)
Proceeds from sale of property, plant and equipment	15,999	12,399	13,734
Proceeds from insurance property claim	1,753	0	0
Net cash used in investing activities	(17,475)	(3,395)	(49,764)
Cash flows from financing activities:
Borrowings on lines of credit	286,154	173,794	327,983
Payments on lines of credit	(208,575)	(221,781)	(335,613)
Purchases of Convertible Notes	(28,137)	(29,124)	0
Payment on Convertible Notes	(38,567)	0	0
Proceeds from term loan	8,258	0	0
Proceeds from financing obligation	8,004	0	0
Debt issuance costs	(295)	0	(1,214)
Proceeds from employee stock plans	0	0	1,314
Purchases of treasury stock	(1,448)	(333)	(21,737)
Other financing activities	(3,986)	(497)	(259)
Net cash provided by (used in) financing activities	21,408	(77,941)	(29,526)
Effect of exchange rate changes on cash	(1,779)	(970)	(399)
Net decrease in cash, cash equivalents, and restricted cash	(859)	(26,515)	(7,403)
Cash, cash equivalents, and restricted cash at beginning of year	30,348	56,863	64,266
Cash, cash equivalents, and restricted cash at end of year	$ 29,489	$ 30,348	$ 56,863