Business Segment and Geographic Information (Operations by Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	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, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Long-Lived Assets	$ 307,346				$ 306,809				$ 307,346	$ 306,809
Revenue, Net	124,176	129,134	125,296	120,155	125,251	146,295	142,167	134,628	498,761	548,341	373,230
United States [Member]
Segment Reporting Information [Line Items]
Long-Lived Assets	64,845				65,432				64,845	65,432
Revenue, Net									115,035	109,581	108,330
Asia [Member]
Segment Reporting Information [Line Items]
Long-Lived Assets	69,830				64,181				69,830	64,181
Revenue, Net									250,682	271,132	179,456
Europe [Member]
Segment Reporting Information [Line Items]
Long-Lived Assets	172,671				177,196				172,671	177,196
Revenue, Net									123,040	154,423	71,255
Other regions [Member]
Segment Reporting Information [Line Items]
Long-Lived Assets	0				0				0	0
Revenue, Net									$ 10,004	$ 13,205	$ 14,189