Segment Information (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenue from external customers and long-lived assets
Net sales	$ 370,084	$ 424,691	$ 365,369
Property, Plant and Equipment, Net	119,687	120,528	118,488
United States[Member]
Revenue from external customers and long-lived assets
Net sales	144,375	140,492	120,576
Property, Plant and Equipment, Net	42,884	46,959	41,906
Europe [Member]
Revenue from external customers and long-lived assets
Net sales	140,208	193,948	162,438
Property, Plant and Equipment, Net	54,768	56,442	61,813
Asia [Member]
Revenue from external customers and long-lived assets
Net sales	39,576	42,591	41,616
Property, Plant and Equipment, Net	22,035	17,127	14,769
Canada [Member]
Revenue from external customers and long-lived assets
Net sales	7,464	6,172	3,909
Mexico [Member]
Revenue from external customers and long-lived assets
Net sales	24,030	23,024	18,032
South America [Member]
Revenue from external customers and long-lived assets
Net sales	14,431	18,464	18,798
All foreign countries [Member]
Revenue from external customers and long-lived assets
Net sales	225,709	284,199	244,793
Property, Plant and Equipment, Net	$ 76,803	$ 73,569	$ 76,582