Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 847,451	$ 770,657	$ 619,793
Cost of sales (exclusive of depreciation and amortization shown separately below)	641,639	589,181	460,414
Selling, general and administrative expense	103,223	93,583	74,112
Acquisition related costs excluded from selling, general and administrative expense	0	5,871	344
Depreciation and amortization	91,846	71,128	52,406
Goodwill impairment	0	182,542	0
Restructuring and integration expense, net	(12)	2,127	386
Other operating (income) expense, net	866	6,089	351
Income (loss) from operations	9,889	(179,864)	31,780
Interest expense	57,155	61,243	52,085
Loss on extinguishment of debt and write-off of debt issuance costs	3,293	19,562	42,087
Derivative (gain) loss on change in interest rate swap fair value	0	0	(101)
Other (income) expense, net	1,140	1,341	(2,084)
Loss before benefit for income taxes and share of net income from joint venture	(51,699)	(262,010)	(60,207)
Benefit for income taxes	3,277	13,413	79,545
Share of net income (loss) from joint venture	1,681	(14,390)	5,211
Income (loss) from continuing operations	(46,741)	(262,987)	24,549
Income from discontinued operations, net of tax (Note 2)	0	0	137,688
Net income (loss)	(46,741)	(262,987)	162,237
Other comprehensive loss:
Reclassification adjustment for discontinued operations	0	0	(9,243)
Foreign currency translation gain (loss)	(3,845)	(13,609)	22,134
Change in fair value of interest rate swap, net of tax	(10,479)	0	0
Reclassification of interest rate swap settlement to income	1,084	0
Other comprehensive income (loss)	(13,240)	(13,609)	12,891
Comprehensive income (loss)	$ (59,981)	$ (276,596)	$ 175,128
Basic net income (loss) per common share:
Income (loss) from continuing operations per share (in usd per share)	$ (1.13)	$ (8.30)	$ 0.89
Income from discontinued operations per share (in shares)	0.00	0.00	5.02
Net income (loss) per share (in shares)	$ (1.13)	$ (8.30)	$ 5.91
Weighted average shares outstanding (in shares)	42,030	31,678	27,433
Diluted net income (loss) per common share:
Income (loss) from continuing operations per share (in usd per share)	$ (1.13)	$ (8.30)	$ 0.89
Income from discontinued operations per share (in usd per share)	0.00	0.00	4.96
Net income (loss) per share (in usd per share)	$ (1.13)	$ (8.30)	$ 5.85
Weighted average shares outstanding (in shares)	42,030	31,678	27,755