Intangible Assets Intangible Assets Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	May 01, 2012
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 1,453	$ (1,500)
Finite-Lived Intangible Assets, Gross	748,148	804,281
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	405,434	428,890
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	262,930	291,185
Customer Relationship Associated with Error Adjustment - Balance Prior to Correction of Error [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross			1,500
Adjustment of Intangible Customer Relationship Asset Acquired [Member] | Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired		$ 1,500