Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
	Mar. 31, 2012	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Purchased intangible assets from acquisition
Gross		$ 42,520		$ 42,520
Accumulated Amortization		(9,589)		(7,159)
Impairment	(22,790)	(7,259)	133
Total		2,882		35,361
Developed technologies [Member]
Purchased intangible assets from acquisition
Gross		26,000		26,000
Accumulated Amortization		(5,703)		(4,163)
Impairment	(15,477)	(4,070)
Total		750		21,837
Trade name [Member]
Purchased intangible assets from acquisition
Gross		12,800		12,800
Accumulated Amortization		(2,018)		(1,387)
Impairment	(5,693)	(3,189)
Total		1,900		11,413
Other [Member]
Purchased intangible assets from acquisition
Gross		3,720		3,720
Accumulated Amortization		(1,868)		(1,609)
Impairment	(1,620)
Total		$ 232		$ 2,111