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Other Comprehensive Income
 6 Months Ended
Jun. 30, 2013
Stockholders' Equity Note [Abstract]  
Other Comprehensive Income
Other Comprehensive Income

Changes in accumulated other comprehensive loss, net of tax, for the three and six months ended June 30, 2013 were as follows:
(Thousands of Dollars)
 
Gains and
Losses on Cash
Flow Hedges
Accumulated other comprehensive loss at April 1
 
$
(22,982
)
Other comprehensive loss before reclassifications
 
(20
)
Gains reclassified from net accumulated other comprehensive loss
 
(118
)
Net current period other comprehensive loss
 
(138
)
Accumulated other comprehensive loss at June 30
 
$
(23,120
)
(Thousands of Dollars)
 
Gains and
Losses on Cash
Flow Hedges
Accumulated other comprehensive loss at Jan. 1
 
$
(22,871
)
Other comprehensive loss before reclassifications
 
(13
)
Gains reclassified from net accumulated other comprehensive loss
 
(236
)
Net current period other comprehensive loss
 
(249
)
Accumulated other comprehensive loss at June 30
 
$
(23,120
)


Reclassifications from accumulated other comprehensive loss for the three and six months ended June 30, 2013 were as follows:
 
 
Amounts Reclassified from
Accumulated Other
Comprehensive Loss
 
(Thousands of Dollars)
 
Three Months Ended June 30, 2013
 
Six Months Ended June 30, 2013
 
Gains on cash flow hedges:
 
 

 
 
 
Interest rate derivatives
 
$
182

(a) 
$
362

(a) 
Vehicle fuel derivatives
 
7

(b) 
19

(b) 
Total, pre-tax
 
189

 
381


Tax expense
 
(71
)
 
(145
)
 
Total amounts reclassified, net of tax
 
$
118

 
$
236



(a) 
Included in interest charges.
(b) 
Included in O&M expenses.