Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 667,280	$ 488,601	$ 373,206
Cost of products sold (exclusive of depreciation and amortization shown separately below)	525,993	384,889	295,136
Selling, general and administrative	51,745	43,756	33,281
Acquisition related costs excluded from selling, general and administrative	11,682	9,248
Depreciation and amortization	44,482	22,146	16,957
(Gain) loss on disposal of assets	(687)		5
Restructuring and impairment charges	7,268	875
Income from operations	26,797	27,687	27,827
Interest expense	29,899	10,895	2,374
Write-off of unamortized debt issuance costs	18,673	1,398
Other expense, net	1,175	2,222	275
Income before provision (benefit) for income taxes and share of net income from joint venture	(22,950)	13,172	25,178
Provision (benefit) for income taxes	(10,518)	5,786	8,000
Share of net income (loss) from joint venture	5,001	831
Net income (loss)	(7,431)	8,217	17,178
Other comprehensive income (loss):
Change in fair value of interest rate hedge	(2,584)	(431)
Foreign currency translation gain (loss)	(21,936)	(17,731)	3,899
Comprehensive income (loss)	$ (31,951)	$ (9,945)	$ 21,077
Basic income (loss) per share:
Net income (loss)	$ (0.35)	$ 0.46	$ 1.00
Weighted average shares outstanding	21,181	17,887	17,176
Diluted income (loss) per share:
Net income (loss)	$ (0.35)	$ 0.45	$ 1.00
Weighted average shares outstanding	21,181	18,253	17,260
Cash dividends per common share	$ 0.28	$ 0.28	$ 0.18