RISK MANAGEMENT AND DERIVATIVE FINANCIAL INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2011

RISK MANAGEMENT AND DERIVATIVE FINANCIAL INSTRUMENTS

Schedule of fair value of derivative financial instruments, balance sheet classification

Non-designated hedging instruments due to regulatory accounting		2011		2010
	Balance Sheet Classification	Fair Value		Fair Value
Natural gas contracts, gas segment	Current assets — Prepaid expenses and other		—		39
	Non-current assets and deferred charges — Other		2		117
Natural gas contracts, electric segment	Current assets — Prepaid expenses and other		—		—
	Non-current assets and deferred charges — Other				77
Total derivatives assets		$	2	$	233

Derivatives designated as hedging instruments		2011		2010
	Balance Sheet Classification	Fair Value		Fair Value
Natural gas contracts, electric segment	Current liabilities	$	—	$	—
	Non-current liabilities and deferred credits		—		—
Non-designated as hedging instruments due to regulatory accounting
Natural gas contracts, gas segment	Current liabilities		967		252
	Non-current liabilities and deferred credits		86		2
Natural gas contracts, electric segment	Current liabilities		3,802		508
	Non-current liabilities and deferred credits		4,995		3,562
Total derivatives liabilities		$	9,850	$	4,324

Schedule of derivatives in cash flow hedging relationships, income statement classification of gain/(loss) and comprehensive income - electric segment

		Amount of Loss Reclassed from OCI into Income (Effective Portion)
	Income Statement Classification of Loss on Derivative	2011		2010
Commodity contracts	Fuel and purchased power expense	$	—	$	(5,814	)
Total Effective — Electric Segment		$	—	$	(5,814	)

		Amount of Loss Recognized in OCI on Derivative (Effective Portion)
	Statement of Comprehensive Income	2011		2010
Commodity contracts	Fuel and purchased power expense	$	—	$	(6,362	)
Total Effective — Electric Segment		$	—	$	(6,362	)

Schedule of mark-to-market pre-tax gains/(losses) from non-designated derivative instruments - electric segment

		Amount of Loss Recognized on Balance Sheet
	Balance Sheet Classification of Loss on Derivative	2011			2010
Commodity contracts — electric segment	Regulatory assets	$	(6,965	)	$	(2,669	)
Total — Electric Segment		$	(6,965	)	$	(2,669	)

		Amount of Loss Recognized in Income on Derivative
	Statement of Operations Classification of Loss on Derivative	2011			2010
Commodity contracts	Fuel and purchased power expense	$	(2,231	)	$	(752	)
Total — Electric Segment		$	(2,231	)	$	(752	)

Schedule of volumes and percentage of anticipated volume of natural gas usage for entity's electric operations

Year	% Hedged			Dth Hedged Physical		Dth Hedged Financial		Average Price
2012		61	%		2,511,000		1,420,000	$	6.459
2013		44	%		2,020,000		1,440,000	$	6.079
2014		20	%		460,000		1,240,000	$	5.514
2015		11	%		—		1,010,000	$	5.439
2016		0	%		—		—	$	—

Schedule of minimum percentage hedged by year in the entity's procurement guidelines

Year	End of Year Minimum % Hedged
Current	Up to 100%
First	60%
Second	40%
Third	20%
Fourth	10%

Schedule of minimum percentage of winter season usage hedged by year of the entity's gas operations

Season	Minimum % Hedged			Dth Hedged Financial		Dth Hedged Physical		Dth in Storage		Actual % Hedged
Current		50	%		420		310		1,436		98	%
Second		Up to 50	%		700		—		—		16	%
Third		Up to 20	%		—		—		—
Total					1,120		310		1,436

Schedule of non-designated hedging instruments due to regulatory accounting - gas segment

		Amount of Loss Recognized on Balance Sheet
	Balance Sheet Classification of Loss on Derivative	2011			2010
Commodity contracts	Regulatory assets	$	(1,916	)	$	(626	)
Total — Gas Segment		$	(1,916	)	$	(626	)