Changes in Accumulated Other Comprehensive Loss

9 Months Ended

Sep. 30, 2017

Accumulated Other Comprehensive Income (Loss) [Line Items]

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 and nine months ended September 30, 2017 and 2016 (dollars in thousands):



	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Balance at beginning of period	$	(43,626	)	$	(43,719	)	$	(43,822	)	$	(44,748	)
Derivative Instruments
OCI (loss) before reclassifications	9			(29		)	(754		)	(595		)
Amounts reclassified from accumulated other comprehensive loss (a)	710			798			2,480			2,564
Net current period OCI (loss)	719			769			1,726			1,969
Pension and Other Postretirement Benefits
OCI (loss) before reclassifications	—			—			(2,157		)	(1,585		)
Amounts reclassified from accumulated other comprehensive loss (b)	790			804			2,136			2,218
Net current period OCI (loss)	790			804			(21		)	633
Balance at end of period	$	(42,117	)	$	(42,146	)	$	(42,117	)	$	(42,146	)


(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 and nine months ended September 30, 2017 and 2016 (dollars in thousands):



	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2017			2016			2017			2016
Balance at beginning of period	$	(25,112	)	$	(25,928	)	$	(25,423	)	$	(27,097	)
Derivative Instruments
OCI (loss) before reclassifications	9			(29		)	(754		)	(595		)
Amounts reclassified from accumulated other comprehensive loss (a)	710			798			2,480			2,564
Net current period OCI (loss)	719			769			1,726			1,969
Pension and Other Postretirement Benefits
OCI (loss) before reclassifications	—			—			(2,121		)	(1,521		)
Amounts reclassified from accumulated other comprehensive loss (b)	777			799			2,202			2,289
Net current period OCI (loss)	777			799			81			768
Balance at end of period	$	(23,616	)	$	(24,360	)	$	(23,616	)	$	(24,360	)


(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.