Other Income and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Other income:
Interest income	$ 184	$ 184	$ 302	$ 294
Investment gains — net	13	0	13	0
Miscellaneous	0	(9)	(1)	116
Total other income	197	175	314	410
Other expense:
Non-operating costs	(2,085)	(1,952)	(4,133)	(4,200)
Investment losses — net	(539)	(650)	(1,058)	(1,145)
Miscellaneous	(218)	(7)	(1,689)	(1,550)
Total other expense	(2,842)	(2,609)	(6,880)	(6,895)
Arizona Public Service Company
Other income:
Interest income	109	6	181	73
Gain on disposition of property	4,989	478	5,321	685
Miscellaneous	649	226	855	591
Total other income	5,747	710	6,357	1,349
Other expense:
Non-operating costs	(2,719)	(1,878)	(4,685)	(4,395)
Loss on disposition of property	(657)	(251)	(1,083)	(894)
Miscellaneous	(1,054)	(320)	(3,412)	(2,514)
Total other expense	$ (4,430)	$ (2,449)	$ (9,180)	$ (7,803)