Gas Reserves (tables)

9 Months Ended

Sep. 30, 2014

Gas Reserves Table [Abstract]

Gas Reserves Table [Text Block]

	September 30,				December 31,
In thousands	2014		2013		2013
Gas reserves, current	$	21,455	$	18,083	$	20,646
Gas reserves, non-current	164,115		130,836		140,573
Less: Accumulated amortization	32,370		15,618		18,575
Total gas reserves(1)	153,200		133,301		142,644
Less: Deferred tax liabilities on gas reserves	33,037		40,553		42,117
Net investment in gas reserves(1)	$	120,163	$	92,748	$	100,527