Other Income and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Other income:
Interest income	$ 184	$ 495	$ 294	$ 746
Miscellaneous	(9)	2,286	116	4,402
Total other income	175	2,781	410	5,148
Other expense:
Non-operating costs	(1,952)	(2,620)	(4,200)	(4,992)
Investment losses — net	(650)	(105)	(1,145)	(246)
Miscellaneous	(7)	2,217	(1,550)	46
Total other expense	(2,609)	(508)	(6,895)	(5,192)
Arizona Public Service Company
Other income:
Interest income	6	417	73	554
Gain on disposition of property	478	328	685	645
Miscellaneous	226	2,476	591	4,784
Total other income	710	3,221	1,349	5,983
Other expense:
Non-operating costs	(1,878)	(2,868)	(4,395)	(5,455)
Loss on disposition of property	(251)	(285)	(894)	(468)
Miscellaneous	(320)	1,676	(2,514)	(610)
Total other expense	$ (2,449)	$ (1,477)	$ (7,803)	$ (6,533)