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Other Comprehensive Income
 3 Months Ended
Mar. 31, 2015
Stockholders' Equity Note [Abstract]  
Other Comprehensive Income
Other Comprehensive Income

Changes in accumulated other comprehensive loss, net of tax, for the three months ended March 31, 2015 and 2014 were as follows:
 
 
Gains and Losses on
Cash Flow Hedges
(Thousands of Dollars)
 
Three Months Ended March 31, 2015
 
Three Months Ended March 31, 2014
Accumulated other comprehensive loss at Jan. 1
 
$
(23,878
)
 
$
(23,338
)
Other comprehensive loss before reclassifications
 
(5
)
 
(3
)
Gains reclassified from net accumulated other comprehensive loss
 
(105
)
 
(120
)
Net current period other comprehensive loss
 
(110
)
 
(123
)
Accumulated other comprehensive loss at March 31
 
$
(23,988
)
 
$
(23,461
)

 
 
 
 
 

Reclassifications from accumulated other comprehensive loss for the three months ended March 31, 2015 and 2014 were as follows:
 
 
Amounts Reclassified from Accumulated
Other Comprehensive Loss
 
(Thousands of Dollars)
 
Three Months Ended March 31, 2015
 
Three Months Ended March 31, 2014
 
(Gains) losses on cash flow hedges:
 
 
 
 
 
Interest rate derivatives
 
$
(180
)
(a) 
$
(180
)
(a) 
Vehicle fuel derivatives
 
11

(b) 
(13
)
(b) 
Total, pre-tax
 
(169
)
 
(193
)
 
Tax expense
 
64

 
73

 
Total amounts reclassified, net of tax
 
$
(105
)
 
$
(120
)
 
 
 
 
 
 
 
(a) 
Included in interest charges.
(b) 
Included in O&M expenses.