Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Net sales	$ 370,084	$ 424,691	$ 365,369
Cost of products sold (exclusive of depreciation and amortization shown separately below)	294,859	347,622	296,422
Selling, general and administrative	31,561	30,657	30,407
Depreciation and amortization	17,643	17,016	19,195
(Gain) loss on disposal of assets	(17)	(36)	808
Restructuring and impairment charges	967		2,289
Income from operations	25,071	29,432	16,248
Interest expense	3,878	4,715	6,815
Write-off of unamortized debt issuance cost			130
Other expense (income), net	852	(1,388)	(1,682)
Income before provision (benefit) for income taxes	20,341	26,105	10,985
Provision (benefit) for income taxes	(3,927)	5,168	4,569
Net income	24,268	20,937	6,416
Other comprehensive income (loss):
Actuarial loss recognized in change of projected benefit obligation (net of tax of $0, $0 and $0, respectively)			(392)
Foreign currency translation gain (loss)	2,806	(2,578)	(6,726)
Comprehensive income (loss)	$ 27,074	$ 18,359	$ (702)
Basic income per share:
Net income	$ 1.43	$ 1.24	$ 0.39
Weighted average shares outstanding	17,009	16,817	16,455
Diluted income per share:
Net income	$ 1.42	$ 1.24	$ 0.39
Weighted average shares outstanding	17,114	16,953	16,570