Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value of Financial Instruments [Abstract]

Fair Value of Derivative Instruments [Table Text Block]

	Level 1	Level 2	Level 3	Total
As of December 31, 2012
Derivative assets, gross
Commodity puts	$             —	$         15,100	$             —	$      15,100
Total derivative assets, gross	—	15,100	—	15,100
Derivative liabilities, gross
Commodity puts	—	—	—	—
Total derivative liabilities, gross	—	—	—	—
Total derivatives, fair value, net	$             —	$         15,100	$             —	$      15,100
As of December 31, 2011
Derivative assets, gross
Commodity puts	$             —	$                 —	$             —	$                 —
Total derivative assets, gross	—	—	—	—
Derivative liabilities, gross
Commodity puts	—	—	—	—
Total derivative liabilities, gross	—	—	—	—
Total derivatives, fair value, net	$             —	$                 —	$             —	$                 —

Assets Measured at Fair Value on a Non-Recurring Basis [Table Text Block]

	Years Ended December 31,
	2012		2011
	Level 3	Total	Level 3	Total
Asset retirement obligations	$(71,200)	$(71,200)	$74,400	$74,400