DERIVATIVE INSTRUMENTS 4 (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Interest Rate Contracts:
Losses recognized in AOCL on effective portion	$ 0		$ 0
Losses reclassified from AOCL into income	(23,000)	[1]	(112,000)	[1]
Gains (losses) recognized in income on ineffective portion	0	[1]	0	[1]
Total	(7,005,000)		(28,815,000)
Net realized gains (losses), derivative instruments, energy-related contracts	(2,600,000)		2,400,000
Fair value derivative instruments with credit-risk-related features	36,300,000
Additional collateral, aggregate fair value	30,200,000
Not Designated as Hedging Instrument
Interest Rate Contracts:
Losses on energy related commodity contracts	(6,707,000)	[2]	(28,601,000)	[2]
Losses on interest rate contracts	$ (298,000)	[1]	$ (214,000)	[1]

[1] Included in Interest Charges

[2] Included in Operating Revenues - Non Utility