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Changes in Accumulated Other Comprehensive Loss (Tables)
 12 Months Ended
Dec. 31, 2014
Changes in accumulated other comprehensive income (loss) including reclassification adjustments, by component:  
Schedule of changes in accumulated other comprehensive loss including reclassification adjustments, by component
The following table shows the changes in accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the year ended December 31, 2014 (dollars in thousands): 
 
Year Ended December 31, 2014
 
Derivative 
Instruments
 
 
 
Pension and 
Other 
Postretirement 
Benefits
 
 
 
Total
Beginning balance
$
(23,058
)
 
 
 
$
(54,995
)
 
 
 
$
(78,053
)
OCI (loss) before reclassifications
(810
)
 
 
 
(5,419
)
 
 
 
(6,229
)
Amounts reclassified from accumulated other comprehensive loss
13,483

 
(a)
 
2,658

 
(b)
 
16,141

Net current period OCI (loss)
12,673

 
 
 
(2,761
)
 
 
 
9,912

Ending balance
$
(10,385
)
 
 
 
$
(57,756
)
 
 
 
$
(68,141
)

(a)
These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA.  See Note 16.
(b)
These amounts primarily represent amortization of actuarial loss, and are included in the computation of net periodic pension cost.  See Note 7.

The following table shows the changes in accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the year ended December 31, 2013 (dollars in thousands): 
 
Year Ended December 31, 2013
 
Derivative 
Instruments
 
 
 
Pension and 
Other 
Postretirement 
Benefits
 
 
 
Total
Beginning balance
$
(49,592
)
 
 
 
$
(64,416
)
 
 
 
$
(114,008
)
OCI (loss) before reclassifications
(213
)
 
 
 
5,594

 
 
 
5,381

Amounts reclassified from accumulated other comprehensive loss
26,747

 
(a)
 
3,827

 
(b)
 
30,574

Net current period OCI
26,534

 
 
 
9,421

 
 
 
35,955

Ending balance
$
(23,058
)
 
 
 
$
(54,995
)
 
 
 
$
(78,053
)

(a)
These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA.  See Note 16.
(b)
These amounts primarily represent amortization of actuarial loss, and are included in the computation of net periodic pension cost.  See Note 7.
ARIZONA PUBLIC SERVICE COMPANY  
Changes in accumulated other comprehensive income (loss) including reclassification adjustments, by component:  
Schedule of changes in accumulated other comprehensive loss including reclassification adjustments, by component
The following table shows the changes in accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the year ended December 31, 2014 (dollars in thousands): 
 
Year Ended December 31, 2014
 
Derivative 
Instruments
 
 
 
Pension and 
Other 
Postretirement 
Benefits
 
 
 
Total
Beginning balance
$
(23,059
)
 
 
 
$
(30,313
)
 
 
 
$
(53,372
)
OCI (loss) before reclassifications
(809
)
 
 
 
(10,415
)
 
 
 
(11,224
)
Amounts reclassified from accumulated other comprehensive loss
13,483

 
(a)
 
2,780

 
(b)
 
16,263

Net current period OCI (loss)
12,674

 
 
 
(7,635
)
 
 
 
5,039

Ending balance
$
(10,385
)
 
 
 
$
(37,948
)
 
 
 
$
(48,333
)

(a)
These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA.  See Note 16.
(b)
These amounts primarily represent amortization of actuarial loss, and are included in the computation of net periodic pension cost.  See Note 7.

The following table shows the changes in accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the year ended December 31, 2013 (dollars in thousands): 
 
Year Ended December 31, 2013
 
Derivative 
Instruments
 
 
 
Pension and 
Other 
Postretirement 
Benefits
 
 
 
Total
Beginning balance
$
(49,592
)
 
 
 
$
(39,503
)
 
 
 
$
(89,095
)
OCI (loss) before reclassifications
(214
)
 
 
 
5,387

 
 
 
5,173

Amounts reclassified from accumulated other comprehensive loss
26,747

 
(a)
 
3,803

 
(b)
 
30,550

Net current period OCI
26,533

 
 
 
9,190

 
 
 
35,723

Ending balance
$
(23,059
)
 
 
 
$
(30,313
)
 
 
 
$
(53,372
)

(a)
These amounts represent realized gains and losses and are included in the computation of fuel and purchased power costs and are subject to the PSA.  See Note 16.
(b)
These amounts primarily represent amortization of actuarial loss, and are included in the computation of net periodic pension cost.  See Note 7.