Derivative and Hedging Instruments (Tables)

9 Months Ended

Sep. 30, 2011

Derivative and Hedging Instruments (Tables) [Abstract]

Gross Notional Volume of Open Derivatives

	September 30, 2011	December 31, 2010
Commodity derivative contracts	415,845 MWh	544,820 MWh
Commodity derivative contracts	6,850,000 Dth	5,420,000 Dth
FTRs	3,724 MW	2,609 MW

Fair Value of Derivative Instruments on the Balance Sheet

	Asset Derivatives			Liability Derivatives
(In thousands)	Balance Sheet Location		Fair Value	Balance Sheet Location		Fair Value
September 30, 2011
Commodity derivative contracts	Other current assets	$	583	Other current liabilities	$	1,003
Commodity derivative contracts	Other deferred charges		15	Other deferred liabilities		8
FTRs	Other current assets		180	Other current liabilities		0
Ten-year PPA	N/A		N/A	Other current liabilities		2,260
Ten-year PPA	N/A		N/A	Other deferred liabilities		24,090
December 31, 2010
Commodity derivative contracts	Other current assets	$	649	Other current liabilities	$	1,227
Commodity derivative contracts	Other deferred charges		214	Other deferred liabilities		167
FTRs	Other current assets		312	Other current liabilities		0
Ten-year PPA	N/A		N/A	Other deferred liabilities		19,010

Derivative Gains and Losses in Balance Sheet

		2011				2010
(In thousands)		Current and long-term regulatory asset		Other current assets		Current and long-term regulatory asset		Other current assets
Three Months Ended September 30:
Balance at July 1,	$	22,604	$	1,001	$	17,345	$	1,030
Change in unrealized loss		3,839		0		4,055		0
Realized loss reclassified to a deferred account		(210)		210		(572)		572
Realized gain (loss) reclassified to income
statement		350		(233)		(177)		(399)
Balance at September 30,	$	26,583	$	978	$	20,651	$	1,203
Nine Months Ended September 30:
Balance at January 1,	$	19,230	$	1,411	$	12,542	$	1,334
Change in unrealized loss		7,775		0		10,731		0
Realized loss reclassified to a deferred account		(1,484)		1,484		(1,381)		1,381
Realized gain (loss) reclassified to income
statement		1,062		(1,917)		(1,241)		(1,512)
Balance at September 30,	$	26,583	$	978	$	20,651	$	1,203

Derivative Gains and Losses in Income Statement

		Realized losses (gains)
				Fuel for electric
		Regulated		generation/		Cost of
(In thousands)		gas revenues		purchased power		gas sold
Three Months Ended September 30, 2011:
Commodity derivative contracts	$	0	$	(94)	$	0
FTRs		0		(23)		0
Ten-year PPA		0		0		0
Three Months Ended September 30, 2010:
Commodity derivative contracts	$	0	$	573	$	(128)
FTRs		0		131		0
Ten-year PPA		0		0		0
Nine Months Ended September 30, 2011:
Commodity derivative contracts	$	0	$	(465)	$	1,315
FTRs		0		5		0
Ten-year PPA		0		0		0
Nine Months Ended September 30, 2010:
Commodity derivative contracts	$	0	$	2,276	$	481
FTRs		0		(4)		0
Ten-year PPA		0		0		0