Condensed Consolidated Statements of Income (Loss) and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Net sales	$ 154,824	$ 125,632	$ 483,425	$ 334,840
Cost of products sold (exclusive of depreciation and amortization shown separately below)	120,195	100,441	378,220	265,010
Selling, general and administrative	11,949	11,124	37,910	29,799
Acquisition related costs excluded from selling, general and administrative	3,948	5,651	3,948	7,080
Depreciation and amortization	8,610	5,864	25,702	13,824
Income from operations	10,122	2,552	37,645	19,127
Interest expense	4,584	5,622	16,543	6,737
Other expense, net	593	1,557	2,012	1,769
Income (loss) before provision (benefit) for income taxes and share of net income from joint venture	4,945	(4,627)	19,090	10,621
Provision (benefit) for income taxes	936	(562)	4,009	4,247
Share of net income from joint venture	621	225	2,503	225
Net income (loss)	4,630	(3,840)	17,584	6,599
Other comprehensive loss:
Foreign currency translation loss	(5,332)	(9,068)	(17,562)	(10,432)
Change in fair value of interest rate hedge	(1,419)		(3,044)
Comprehensive loss	$ (2,121)	$ (12,908)	$ (3,022)	$ (3,833)
Basic income (loss) per common share:	$ 0.17	$ (0.21)	$ 0.87	$ 0.36
Weighted average shares outstanding	26,839	17,979	20,122	17,749
Diluted income (loss) per common share:	$ 0.17	$ (0.21)	$ 0.86	$ 0.36
Weighted average shares outstanding	27,167	17,979	20,467	18,120
Cash dividends per common share	$ 0.07	$ 0.07	$ 0.21	$ 0.21