Property, Plant and Equipment, Net (Details) (USD $) In Thousands, unless otherwise specified					3 Months Ended				3 Months Ended				3 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Machinery and equipment [Member]	Dec. 31, 2012 Machinery and equipment [Member]	Mar. 31, 2013 Machinery and equipment [Member] Maximum [Member]	Mar. 31, 2013 Machinery and equipment [Member] Minimum [Member]	Mar. 31, 2013 Leasehold improvements [Member]	Dec. 31, 2012 Leasehold improvements [Member]	Mar. 31, 2013 Leasehold improvements [Member] Maximum [Member]	Mar. 31, 2013 Leasehold improvements [Member] Minimum [Member]	Mar. 31, 2013 Office equipment, furniture and fixtures [Member]	Dec. 31, 2012 Office equipment, furniture and fixtures [Member]	Mar. 31, 2013 Office equipment, furniture and fixtures [Member] Maximum [Member]	Mar. 31, 2013 Office equipment, furniture and fixtures [Member] Minimum [Member]	Mar. 31, 2013 Purchased software [Member]	Dec. 31, 2012 Purchased software [Member]	Mar. 31, 2013 Purchased software [Member] Maximum [Member]	Mar. 31, 2013 Purchased software [Member] Minimum [Member]
Property, Plant and Equipment, Net
Property, plant and equipment, estimated useful lives					7 years	1 year 6 months			10 years	3 years			7 years	5 years			7 years	1 year
Property, plant and equipment, gross	$ 31,414	$ 30,460	$ 18,057	$ 17,894			$ 8,101	$ 8,082			$ 1,025	$ 912			$ 4,231	$ 3,572
Less: accumulated depreciation	(12,103)	(11,080)
Property, plant and equipment, net	$ 19,311	$ 19,380