Divestitures (Details) (USD $)	1 Months Ended			3 Months Ended		6 Months Ended		7 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jan. 31, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2011
Divestitures (Textual) [Abstract]
Sale of oil and gas properties								$ 44,600,000
Gains on sale		2,500,000	9,900,000	(266,000)	2,435,000	(157,000)	12,357,000
Selling costs and adjustments		2,400,000	225,000
Reduction in oil and gas full cost pool			1,500,000
Escrow to cover potential claims	564,000	6,400,000		564,000	6,400,000	564,000	6,400,000	6,400,000	6,439,000
Escrowed funds	5,700,000
Decrease in gain on sale of oil and gas properties	219,000
Escrow deposit of first and second closing retained by company	1,300,000					1,300,000
Escrow deposit of first and second closing payment to lender	4,400,000
Escrow deposit of third closing expected to be retained by company	164,000			164,000		164,000
Escrow deposit of third closing expected payment to third party	400,000			400,000		400,000
Reduction In Gain on sale of oil and gas property	$ 56,000