Changes in Accumulated Other Comprehensive Loss

3 Months Ended

Mar. 31, 2016

Accumulated Other Comprehensive Income (Loss) [Line Items]

Changes in Accumulated Other Comprehensive Loss

Changes in Accumulated Other Comprehensive Loss

The following table shows the changes in Pinnacle West's consolidated accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the three months ended March 31, 2016 and 2015 (dollars in thousands):

	Three Months Ended
	March 31,
	2016			2015
Balance at beginning of period	$	(44,748	)	$	(68,141	)
Derivative Instruments
OCI (loss) before reclassifications	(693		)	(800		)
Amounts reclassified from accumulated other comprehensive loss (a)	1,141			1,976
Net current period OCI (loss)	448			1,176
Pension and Other Postretirement Benefits
Amounts reclassified from accumulated other comprehensive loss (b)	530			583
Net current period OCI (loss)	530			583
Balance at end of period	$	(43,770	)	$	(66,382	)

(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 6.

(b) These amounts primarily represent amortization of actuarial loss, and are included in the computation of net periodic pension cost.  See Note 4.

Arizona Public Service Company

Accumulated Other Comprehensive Income (Loss) [Line Items]

Changes in Accumulated Other Comprehensive Loss

The following table shows the changes in APS's consolidated accumulated other comprehensive loss, including reclassification adjustments, net of tax, by component for the three months ended March 31, 2016 and 2015 (dollars in thousands):

	Three Months Ended
	March 31,
	2016			2015
Balance at beginning of period	$	(27,097	)	$	(48,333	)
Derivative Instruments
OCI (loss) before reclassifications	(693		)	(800		)
Amounts reclassified from accumulated other comprehensive loss (a)	1,141			1,976
Net current period OCI (loss)	448			1,176
Pension and Other Postretirement Benefits
Amounts reclassified from accumulated other comprehensive loss (b)	611			681
Net current period OCI (loss)	611			681
Balance at end of period	$	(26,038	)	$	(46,476	)

(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 6.

(b) These amounts primarily represent amortization of actuarial loss and are included in the computation of net periodic pension cost.  See Note 4.