Fair Value Measurement (Details) (USD $)																																		12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Carrying Value	Dec. 31, 2012 Carrying Value	Dec. 30, 2012 Carrying Value	Jun. 30, 2013 Carrying Value U.S. Credit Facility	Dec. 31, 2012 Carrying Value U.S. Credit Facility	Dec. 31, 2012 Carrying Value Japanese working capital loan	Jun. 30, 2013 Carrying Value Japanese term loan	Dec. 31, 2012 Carrying Value Japanese term loan	Jun. 30, 2013 Carrying Value China Credit Facility	Jun. 30, 2013 Carrying Value Other loans	Dec. 31, 2012 Carrying Value Other loans	Jun. 30, 2013 Total Fair Value U.S. Credit Facility	Dec. 31, 2012 Total Fair Value U.S. Credit Facility	Dec. 31, 2012 Total Fair Value Japanese working capital loan	Jun. 30, 2013 Total Fair Value Japanese term loan	Dec. 31, 2012 Total Fair Value Japanese term loan	Jun. 30, 2013 Total Fair Value China Credit Facility	Jun. 30, 2013 Total Fair Value Other loans	Dec. 31, 2012 Total Fair Value Other loans	Jun. 30, 2013 Level 2 U.S. Credit Facility	Dec. 31, 2012 Level 2 U.S. Credit Facility	Dec. 31, 2012 Level 2 Japanese working capital loan	Jun. 30, 2013 Level 2 Japanese term loan	Dec. 31, 2012 Level 2 Japanese term loan	Jun. 30, 2013 Level 2 China Credit Facility	Jun. 30, 2013 Level 2 Other loans	Dec. 31, 2012 Level 2 Other loans	Jun. 30, 2013 Recurring Total Fair Value	Dec. 31, 2012 Recurring Total Fair Value	Jun. 30, 2013 Recurring Level 2	Dec. 31, 2012 Recurring Level 2	Dec. 31, 2012 Nonrecurring Restructuring charges	Dec. 31, 2012 Nonrecurring Level 3
Fair Value Measurement
Derivative assets	$ 1,883,000	$ 1,120,000	$ 1,883,000	$ 1,120,000																										$ 1,883,000	$ 1,120,000	$ 1,883,000	$ 1,120,000
Derivative liabilities			(350,000)	(646,000)																										(350,000)	(646,000)	(350,000)	(646,000)
Acquisition earn-out liability			(1,546,000)	(1,300,000)																										(1,546,000)	(1,300,000)	(1,546,000)	(1,300,000)
Debt instrument						(45,700,000)	(44,250,000)	(18,611,000)	(10,193,000)	(954,000)	(61,000)	(156,000)	(158,000)	(45,700,000)	(44,250,000)	(18,611,000)	(10,193,000)	(954,000)	(61,000)	(156,000)	(158,000)	(45,700,000)	(44,250,000)	(18,611,000)	(10,193,000)	(954,000)	(61,000)	(156,000)	(158,000)
Long-lived assets	262,602,000	262,993,000			4,700,000																														700,000
Restructuring charges																																		$ 4,000,000