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Comprehensive Income
12 Months Ended
Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Comprehensive Income (Loss)
ACCUMULATED OTHER COMPREHENSIVE INCOME

Balances by classification included within Accumulated other comprehensive loss on the accompanying Consolidated Balance Sheets were as follows (in thousands):
 
Derivatives Designated as Cash Flow Hedges
Employee Benefit Plans
Total
As of Dec. 31, 2011
$
(13,802
)
$
(19,076
)
$
(32,878
)
Other comprehensive income (loss)
(1,911
)
(699
)
(2,610
)
As of Dec. 31, 2012
$
(15,713
)
$
(19,775
)
$
(35,488
)
 
 
 
 
 
 
 
 
 
Derivatives Designated as Cash Flow Hedges
Employee Benefit Plans
Total
As of Dec. 31, 2010 *
$
(12,439
)
$
(11,142
)
$
(23,581
)
Other comprehensive income (loss)
(1,363
)
(7,934
)
(9,297
)
As of Dec. 31, 2011
$
(13,802
)
$
(19,076
)
$
(32,878
)

____________
* Includes cash flow hedges of equity method investee related to the Idaho Cogeneration Facilities.