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Debt and Other Obligations Contractual Maturities (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Contractual Maturities [Abstract]    
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year $ 58,607  
Long-term Debt, Maturities, Repayments of Principal in Year Two 113,125  
Long-term Debt, Maturities, Repayments of Principal in Year Three 166,127  
Long-term Debt, Maturities, Repayments of Principal in Year Four 154,255  
Long-term Debt, Maturities, Repayments of Principal in Year Five 1,824,027  
Long-term Debt, Maturities, Repayments of Principal after Year Five 11,619,021  
Debt Instrument, Unamortized Adjustments 93,897  
Debt and Capital Lease Obligations 13,841,265 $ 12,171,142
Total Cash Obligations $ 13,935,162