Business Combinations (Tables)

12 Months Ended

Dec. 31, 2012

Business Combinations [Abstract]

Acquisitions Property Plant And Equipment Producing Assets Net Working Interest Table [Text Block]

Purchase Price		$	255,400
Purchase Price adjustments for estimated after-tax cash flows from the acquired asset and
	interest costs from effective date of January 1, 2011 to closing		(25,823)
Total purchase price		$	229,577
Allocation of purchase price:
	Property and equipment	$	186,801
	Goodwill		50,878
	Current assets		24,632
	Current liabilities		(12,815)
	Deferred tax liability		(5,818)
	Other long-term liabilities		(14,101)
Total purchase price		$	229,577

Business Acquisition, Pro Forma Information [Table Text Block]

	Year Ended December 31,
		2012		2011
Revenues	$	291,575	$	318,476
Net income (loss) to common shareholders	$	(95,245)	$	(131,881)
Net Income (loss) per share - basic and diluted	$	(2.24)	$	(3.67)