Subsequent Event (Details)	Mar. 31, 2013 Mcf	Apr. 30, 2013 One new commodity contracts Mcf	Apr. 30, 2013 One new commodity contracts Fixed Price Swap Mcf	Apr. 30, 2013 One new commodity contracts Fixed Price Swap Minimum	Apr. 30, 2013 One new commodity contracts Fixed Price Swap Maximum
Commodity volumes under derivative contracts
Remaining Contractual Volume	10,345,000	3,000,000	3,000,000
Term				--01-15	--12-15
Contract Price			4.28