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Debt and Other Obligations Contractual Maturities (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Contractual Maturities [Abstract]    
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year $ 29,588  
Long-term Debt, Maturities, Repayments of Principal in Year Two 113,667  
Long-term Debt, Maturities, Repayments of Principal in Year Three 166,726  
Long-term Debt, Maturities, Repayments of Principal in Year Four 154,989  
Long-term Debt, Maturities, Repayments of Principal in Year Five 1,824,666  
Long-term Debt, Maturities, Repayments of Principal after Year Five 13,022,295  
Debt Instrument, Unamortized Adjustments 107,516  
Debt and Capital Lease Obligations 15,204,415 $ 12,171,142
Total Cash Obligations $ 15,311,931