Gas Reserves (tables)

9 Months Ended

Sep. 30, 2013

Gas Reserves Table [Abstract]

Gas Reserves Table [Text Block]

	September 30,				December 31,
In thousands	2013		2012		2012
Gas reserves, current	$	18,083	$	13,140	$	14,966
Gas reserves, non-current	130,836		81,692		92,179
Less: Accumulated amortization	15,618		5,767		7,486
Total gas reserves	133,301		89,065		99,659
Less: Deferred tax liabilities on gas reserves	40,553		23,940		28,329
Net investment in gas reserves	$	92,748	$	65,125	$	71,330