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Accounting Policies (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Other current assets $ 39,741 $ 39,866
Debt issuance costs 64,857 64,857
Current maturities of debt $ 0 5,042,353
Scenario, Previously Reported [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Other current assets   104,723
Current maturities of debt   5,107,210
Accounting Standards Update 03-2015 [Member] | Other Current Assets [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Debt issuance costs   (64,857)
Accounting Standards Update 03-2015 [Member] | Long-term Debt, Current [Member]    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]    
Debt issuance costs   $ 64,857