Regulatory Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2012

Regulatory Assets and Liabilities (Tables) [Abstract]

Regulatory Assets and Liabilities

(In thousands)		2012		2011
Regulatory Assets
Asset retirement obligation	$	4,608	$	5,847
Conservation costs		0		571
Debt related costs		5,468		4,662
Derivatives		72,328		42,356
Elm Road		2,614		0
Environmental costs		1,154		584
Medicare Part D subsidy		854		2,851
Pension and OPRB costs		1,234		2,468
Tax recovery related to AFUDC equity		5,241		4,400
Unfunded pension and other postretirement liability		134,839		148,467
Other		840		976
Total regulatory assets	$	229,180	$	213,182
Regulatory Liabilities
Conservation costs	$	455	$	0
Deferred fuel savings		6,163		0
Elm Road		0		3,649
Income taxes		2,346		2,774
Non-ARO removal cost		13,957		13,116
Renewable energy credits		480		331
Other		1,137		593
Total regulatory liabilities	$	24,538	$	20,463