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Summary of Significant Accounting Policies Deferred Costs (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Operating Leased Assets [Line Items]    
Intangible Assets, net 99,403us-gaap_FiniteLivedIntangibleAssetsNet $ 132,329us-gaap_FiniteLivedIntangibleAssetsNet
Service Life [Member]    
Operating Leased Assets [Line Items]    
Remaining Lease Period - Minimum 1 year 0 months 0 days  
Remaining Lease Period - Maximum 15 years 0 months 0 days