Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Net sales	$ 126,804	$ 116,213
Cost of sales (exclusive of depreciation and amortization shown separately below)	99,688	94,478
Selling, general, and administrative expense	14,575	16,160
Depreciation and amortization	11,568	11,357
Goodwill impairment	0	92,942
Other operating expense (income), net	(5)	5,126
Income (loss) from operations	978	(103,850)
Interest expense	2,024	3,807
Loss on extinguishment of debt and write-off of debt issuance costs	2,390	0
Derivative payments on interest rate swap	1,717	0
Loss on interest rate swap	2,033	0
Other expense (income), net	(122)	1,544
Loss from continuing operations before benefit for income taxes and share of net income (loss) from joint venture	(7,064)	(109,201)
Benefit for income taxes	756	1,395
Share of net income (loss) from joint venture	1,395	(271)
Loss from continuing operations	(4,913)	(108,077)
Loss from discontinued operations, net of tax (Note 2)	0	(140,114)
Net loss	(4,913)	(248,191)
Other comprehensive loss:
Foreign currency translation loss	(3,347)	(14,342)
Change in fair value, net of tax	0	(11,209)
Reclassification adjustment for losses included in net loss, net of tax	2,851	1,052
Other comprehensive loss	(496)	(24,499)
Comprehensive loss	$ (5,409)	$ (272,690)
Basic net loss per common share:
Loss from continuing operations per common share (in dollars per share)	$ (0.46)	$ (2.64)
Loss from discontinued operations per common share (in dollars per share)	0	(3.32)
Net loss per common share (in dollars per shares)	$ (0.46)	$ (5.96)
Weighted average common shares outstanding, basic (in shares)	42,672	42,111
Diluted net loss per common share:
Loss from continuing operations per common share (in dollars per share)	$ (0.46)	$ (2.64)
Loss from discontinued operations per common share (in dollars per share)	0	(3.32)
Net loss per common share (in dollars per share)	$ (0.46)	$ (5.96)
Weighted average common shares outstanding, diluted (in shares)	42,672	42,111