Basis of Presentation (Going Concern) (Details) (USD $)	0 Months Ended
	Apr. 15, 2015	Mar. 31, 2015	Dec. 31, 2014	May 15, 2015
Debt Instrument [Line Items]
Long-term debt		$ 0	$ 3,068,878,000
8.50% senior notes
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)		8.50%
9.50% senior secured notes
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)		9.50%
Subsequent Event
Debt Instrument [Line Items]
Percentage of debt holders (at least)				25.00%
Subsequent Event | 8.50% and 9.50% Senior Notes
Debt Instrument [Line Items]
Interest Payment Grace Period (in days)	30 days
Aggregate amount of principal payments	62,400,000
Subsequent Event | 8.50% senior notes
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	8.50%
Subsequent Event | 9.50% senior secured notes
Debt Instrument [Line Items]
Weighted Average Interest Rate (as a percent)	9.50%
Total principal of long-term debt
Debt Instrument [Line Items]
Long-term debt		$ 3,100,000,000