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Condensed Guarantor and Non-Guarantor Financial Statements, Narrative (Details)
Sep. 30, 2016
May 15, 2016
May 23, 2012
Condensed Financial Statements, Captions      
Ownership interest by parent 100.00%    
Senior Notes Due 2020 | Senior Notes      
Condensed Financial Statements, Captions      
Debt instrument contractual rate (percent)     8.25%
Senior Notes Due 2024 | Senior Notes      
Condensed Financial Statements, Captions      
Debt instrument contractual rate (percent)   5.875%