Condensed Guarantor and Non-Guarantor Financial Information, Narrative (Details) - USD ($)	Jun. 30, 2017	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, Face Amount			$ 225,000,000
Debt instrument contractual rate (percent)			8.25%
Senior Notes Due 2024 | Senior Notes
Condensed Financial Statements, Captions
Debt Instrument, Face Amount		$ 375,000,000
Debt instrument contractual rate (percent)		5.875%