Gas Reserves and Other Investments (tables)

9 Months Ended

Sep. 30, 2012

Gas Reserves Table [Abstract]

Gas Reserves Table [Text Block]

	September 30,				December 31,
Thousands	2012		2011		2011
Gas reserves, current	$	13,140	$	2,366	$	4,463
Gas reserves, non-current	81,692		28,551		48,597
Less: Accumulated amortization	5,767		426		1,146
Total gas reserves	89,065		30,491		51,914
Less: Deferred taxes on gas reserves	23,940		10,090		15,630
Net investment in gas reserves	$	65,125	$	20,401	$	36,284