Other Balance Sheet Details (Schedule of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, cost	61,500	61,500
Identifiable intangible assets, accumulated amortization	37,403	33,198
Identifiable intangible assets, net	24,097	28,302
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets, cost	3,300	3,300
Identifiable intangible assets, accumulated amortization	2,533	2,046
Identifiable intangible assets, net	767	1,254
Technology [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	4 years	4 years
Technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	9 years	9 years
Patents and Other Core Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	9 years	9 years
Identifiable intangible assets, cost	15,100	15,100
Identifiable intangible assets, accumulated amortization	10,547	8,870
Identifiable intangible assets, net	4,553	6,230
In- Process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life
Identifiable intangible assets, cost	1,800	1,800
Identifiable intangible assets, accumulated amortization	1,800	1,800
Identifiable intangible assets, net
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	15 years	15 years
Identifiable intangible assets, cost	2,600	2,600
Identifiable intangible assets, accumulated amortization	1,090	916
Identifiable intangible assets, net	1,510	1,684
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	9 years	9 years
Identifiable intangible assets, cost	5,200	5,200
Identifiable intangible assets, accumulated amortization	3,632	3,054
Identifiable intangible assets, net	1,568	2,146
Facilities Lease [Member]
Finite-Lived Intangible Assets [Line Items]
Useful life	19 years	19 years
Identifiable intangible assets, cost	33,500	33,500
Identifiable intangible assets, accumulated amortization	17,801	16,512
Identifiable intangible assets, net	15,699	16,988