Acquisitions Purchase Price Allocation (Details) (USD $) In Thousands, unless otherwise specified			0 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Jan. 12, 2012 ADAPTIX, Inc. [Member]
Business Acquisition [Line Items]
Fair value of net tangible assets acquired			$ 10,000
Intangible assets acquired - patents			150,000
Goodwill	30,149	30,149	30,149
Net deferred income tax liability			(30,149)
Total purchase price			160,000
Intangible assets acquired - patents - amortization period			10 years
Intangible assets acquired - patents - annual amortization			$ 15,000