Acquisitions (Details) (USD $)	0 Months Ended	6 Months Ended				0 Months Ended		0 Months Ended
	Jul. 03, 2013	Jun. 30, 2014	Jun. 30, 2013	Aug. 19, 2010 Ten Percent Senior Notes	Jul. 03, 2013 Gulf of Mexico Acquisition well platform	Jul. 03, 2013 Gulf of Mexico Acquisition General and Administrative Expense Bridge Loan [Member]	Jul. 03, 2013 Ten Percent Senior Notes Senior Notes [Member]	Jul. 03, 2013 Ten Percent Senior Notes Gulf of Mexico Acquisition
Business Acquisition [Line Items]
Purchase price								$ 188,800,000
Number of wells acquired					16
Number of platforms purchased					7
Principal amount	200,000,000			150,000,000			200,000,000
Interest rate of Senior Notes				10.00%			10.00%
Payments of financing costs	5,000,000	109,000	774,000
Acquisition-related costs	$ 4,000,000					$ 2,600,000