Summary of Significant Accounting Policies Accumulated Other Comprehensive Income (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Statement of Comprehensive Income [Abstract]      
Foreign currency translation adjustment $ (340,847) $ (334,893) $ (97,589)
Total comprehensive loss $ (2,332,974) $ (1,982,235) $ (864,640)