Reportable Segments and Geographic Data (Schedule of Financial Data by Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 189,600	$ 183,100	$ 198,000	$ 186,700	$ 194,300	$ 194,600	$ 191,900	$ 180,100	$ 197,400	$ 200,300	$ 189,700	$ 200,000	$ 757,414	$ 760,941	$ 787,287
Property, plant and equipment, net	418,830				420,154				438,953				418,830	420,154	438,953
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales													338,729	324,764	306,371
Property, plant and equipment, net	162,380				137,405				133,651				162,380	137,405	133,651
Switzerland [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales													190,035	203,478	245,562
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales													62,076	58,755	61,493
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	35,542				38,266				34,102				35,542	38,266	34,102
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales													31,167	36,182	40,422
Property, plant and equipment, net	22,434				27,396				29,650				22,434	27,396	29,650
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales													43,265	39,929	34,977
Property, plant and equipment, net	103,109				114,037				126,072				103,109	114,037	126,072
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	25,246				26,269				27,196				25,246	26,269	27,196
Sweden [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property, plant and equipment, net	19,508				23,397				26,210				19,508	23,397	26,210
Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales													92,142	97,833	98,462
Property, plant and equipment, net	$ 50,611				$ 53,384				$ 62,072				$ 50,611	$ 53,384	$ 62,072