Acquisition Acquisition Deferred Tax (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 12, 2012
Business Acquisition [Line Items]
Estimated tax rate	(35.00%)	(35.00%)	35.00%
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%
Deferred tax asset, acquisition				$ (30,149,000)