Gas Reserves (details) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Gas Reserves [Abstract]
Amended Gas Reserves Agreement Date	Mar. 28, 2014
Encana Gas Reserves Investment	$ 178,000,000
Gas Reserves Percent Gas Supplies YTD	8.00%	6.00%
Gas Reserves, Current	20,373,000	15,324,000	20,646,000
Gas Reserves Noncurrent Gross	157,535,000	126,215,000	140,573,000
Gas Reserves Amortization	27,255,000	12,453,000	18,575,000
Total Gas Reserves	150,653,000	129,086,000	142,644,000
Deferred Taxes Related To Gas Reserves	34,828,000	39,963,000	42,117,000
Net investment in gas reserves	$ 115,825,000	$ 89,123,000	$ 100,527,000