CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net unrealized loss, tax benefit (expense)	$ 18	$ 96	$ (608)	$ (392)
Reclassification of net realized loss, tax benefit	500	567	691	1,490
Pension and other postretirement benefits activity, tax expense	504	553	709	1,345
Arizona Public Service Company
Net unrealized loss, tax benefit (expense)	18	96	(608)	(392)
Reclassification of net realized loss, tax benefit	500	567	691	1,490
Pension and other postretirement benefits activity, tax expense	$ 501	$ 553	$ 657	$ 1,275