Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Net sales	$ 619,793	$ 584,954	$ 405,443
Cost of sales (exclusive of depreciation and amortization shown separately below)	459,080	428,843	320,632
Selling, general and administrative expense	74,112	64,144	34,873
Acquisition related costs excluded from selling, general and administrative expense	344	0	11,682
Depreciation and amortization	52,406	50,721	32,973
Other operating expense (income)	351	809	(24)
Restructuring and integration expense	386	5,658	5,249
Income from operations	33,114	34,779	58
Interest expense	52,085	62,870	29,582
Loss on extinguishment of debt and write-off of unamortized debt issuance costs	42,087	2,589	19,173
Derivative payments on interest rate swap		609
Derivative loss (gain) on change in interest rate swap fair value	(101)	2,448
Other (income) expense, net	(2,084)	(2,871)	521
Loss from continuing operations before benefit for income taxes and share of net income from joint venture	(58,873)	(30,866)	(49,218)
Benefit for income taxes	79,026	15,438	19,842
Share of net income from joint venture	5,211	5,938	5,001
Income (loss) from continuing operations	25,364	(9,490)	(24,375)
Income from discontinued operations, net of tax (Note 2)	137,688	16,153	17,889
Net income (loss)	163,052	6,663	(6,486)
Other comprehensive income (loss):
Change in fair value of interest rate swap		1,910	(1,637)
Reclassification adjustment for discontinued operations	(9,243)
Foreign currency translation gain (loss)	22,094	(10,623)	(24,903)
Other comprehensive income (loss):	12,851	(8,713)	(26,540)
Comprehensive income (loss)	$ 175,903	$ (2,050)	$ (33,026)
Basic net income (loss) per share:
Income (loss) from continuing operations per share	$ 0.92	$ (0.35)	$ (1.15)
Income from discontinued operations per share	5.02	0.60	0.84
Net income (loss) per share	$ 5.94	$ 0.25	$ (0.31)
Weighted average shares outstanding	27,433	27,016	21,181
Diluted net income (loss) per share:
Income (loss) from continuing operations per share	$ 0.91	$ (0.35)	$ (1.15)
Income from discontinued operations per share	4.96	0.60	0.84
Net income (loss) per share	$ 5.87	$ 0.25	$ (0.31)
Diluted shares outstanding	27,755	27,016	21,181
Cash dividends per common share	$ 0.28	$ 0.28	$ 0.28