Acquisitions (Details) (USD $)			0 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Jan. 12, 2012 ADAPTIX, Inc. [Member] patents countries
Business Acquisition [Line Items]
Purchase price allocation, cash and cash equivalents			$ 10,000,000
Number of patents acquired			230
Number of countries which have patents			13
Cash payments to acquire businesses			160,000,000
Intangible assets acquired - patents - amortization period			10 years
Intangible assets acquired - patents, book basis			150,000,000
Intangible assets acquired - patents, tax basis			0
Intangible assets acquired - patents - difference			(150,000,000)
Estimated net operating loss carryforwards - ADAPTIX, book basis			0
Estimated net operating loss carryforwards - ADAPTIX, tax basis			63,860,000
Estimated net operating loss carryforwards - ADAPTIX, difference			63,860,000
Net deferred tax liability - pretax			(86,140,000)
Estimated tax rate			35.00%
Estimated net deferred tax liability	$ 17,748,000	$ 27,831,000	$ (30,149,000)