Long-term Debt - Schedule of Redemption Prices (Details) - Senior notes	1 Months Ended
	May 31, 2015	Feb. 28, 2014
Senior PIK Toggle Notes due May 2020 | 2016
Debt Instrument [Line Items]
Redemption price (as percent)	102.00%
Senior PIK Toggle Notes due May 2020 | 2017
Debt Instrument [Line Items]
Redemption price (as percent)	101.00%
Senior PIK Toggle Notes due May 2020 | 2018 and thereafter
Debt Instrument [Line Items]
Redemption price (as percent)	100.00%
7.50% senior notes due February 2022 | 2016
Debt Instrument [Line Items]
Redemption price (as percent)		105.625%
7.50% senior notes due February 2022 | 2017
Debt Instrument [Line Items]
Redemption price (as percent)		105.625%
7.50% senior notes due February 2022 | 2018
Debt Instrument [Line Items]
Redemption price (as percent)		103.75%
7.50% senior notes due February 2022 | 2019
Debt Instrument [Line Items]
Redemption price (as percent)		101.875%
7.50% senior notes due February 2022 | 2020 and thereafter
Debt Instrument [Line Items]
Redemption price (as percent)		100.00%