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Other Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Debt issuance costs, net of amortization $ 72,259 $ 56,445
Deferred tax asset 0 95,843
Investments 10,106 11,106
Other 0 1,853
Total other assets $ 82,365 $ 165,247