Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 770,657	$ 619,793	$ 584,954
Cost of sales (exclusive of depreciation and amortization shown separately below)	588,205	459,080	428,843
Selling, general and administrative expense	93,583	74,112	64,144
Acquisition related costs excluded from selling, general and administrative expense	5,871	344	0
Depreciation and amortization	71,128	52,406	50,721
Other operating (income) expense, net	6,089	351	809
Goodwill impairment	182,542	0	0
Restructuring and integration expense, net	2,127	386	5,658
Income (loss) from operations	(178,888)	33,114	34,779
Interest expense	61,243	52,085	62,870
Loss on extinguishment of debt and write-off of debt issuance costs	19,562	42,087	2,589
Derivative payments on interest rate swap	0	0	609
Derivative loss (gain) on change in interest rate swap fair value	0	(101)	2,448
Other (income) expense, net	1,341	(2,084)	(2,871)
Loss from continuing operations before benefit for income taxes and share of net income from joint venture	(261,034)	(58,873)	(30,866)
Benefit for income taxes	10,957	79,026	15,438
Share of net income (loss) from joint venture	(14,390)	5,211	5,938
Income (loss) from continuing operations	(264,467)	25,364	(9,490)
Income from discontinued operations, net of tax (Note 2)	0	137,688	16,153
Net income (loss)	(264,467)	163,052	6,663
Other comprehensive income (loss):
Change in fair value of interest rate swap	0	0	1,910
Reclassification adjustment for discontinued operations	0	(9,243)	0
Foreign currency translation gain (loss)	(13,880)	22,094	(10,623)
Other comprehensive income (loss)	(13,880)	12,851	(8,713)
Comprehensive income (loss)	$ (278,347)	$ 175,903	$ (2,050)
Basic net income (loss) per share:
Income (loss) from continuing operations per share (in usd per share)	$ (8.35)	$ 0.92	$ (0.35)
Income from discontinued operations per share (in shares)	0.00	5.02	0.60
Net income (loss) per share (in shares)	$ (8.35)	$ 5.94	$ 0.25
Weighted average shares outstanding (in shares)	31,678	27,433	27,016
Diluted net income (loss) per share:
Income (loss) from continuing operations per share (in usd per share)	$ (8.35)	$ 0.91	$ (0.35)
Income from discontinued operations per share (in usd per share)	0.00	4.96	0.60
Net income (loss) per share (in usd per share)	$ (8.35)	$ 5.87	$ 0.25
Weighted average shares outstanding (in shares)	31,678	27,755	27,016