Acquisition Acquisition Deferred Tax (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jan. 12, 2012 ADAPTIX, Inc. [Member]
Business Acquisition [Line Items]
Book basis of intangible assets acquired - patents				$ 150,000,000
Tax basis of intangible assets acquired - patents				0
Change from book and tax basis of intangible assets acquired - patents				(150,000,000)
Estimated net operating loss carryforwards - ADAPTIX				0
Tax basis of estimated net operating loss carryforwards - ADAPTIX				63,860,000
Change from book and tax basis of estimated net operating loss carryforwards - ADAPTIX				63,860,000
Net deferred tax liability - pretax				(86,140,000)
Estimated tax rate	35.00%	35.00%	34.00%	35.00%
Estimated net deferred tax liability				$ (30,149,000)