Acquisition (Details) (USD $)	9 Months Ended		0 Months Ended	3 Months Ended		0 Months Ended	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Jul. 03, 2013 10% Senior Notes [Member]	Sep. 30, 2013 10% Senior Notes [Member]	Aug. 19, 2010 10% Senior Notes [Member]	Jul. 03, 2013 Gulf of Mexico Acquisition [Member] well platform	Sep. 30, 2013 Gulf of Mexico Acquisition [Member] General and Administrative Expense [Member]	Sep. 30, 2013 Gulf of Mexico Acquisition [Member] General and Administrative Expense [Member] Bridge Loan [Member]
Business Acquisition [Line Items]
Purchase price						$ 188,200,000
Number of wells acquired						16
Number of platforms purchased						7
Principal amount			200,000,000		150,000,000
Interest rate of Senior Notes			10.00%
Payments of financing costs	487,000	33,000	4,000,000	900,000
Acquisition-related costs							3,900,000
Expected acquisition-related costs								$ 2,600,000