Other Income and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other income:
Interest income	$ 127	$ 103	$ 422	$ 849
Miscellaneous	12	2,263	127	6,665
Total other income	139	2,366	549	7,514
Other expense:
Non-operating costs	(2,328)	(1,985)	(6,529)	(6,976)
Investment losses — net	(563)	(118)	(1,708)	(364)
Miscellaneous	(2,647)	(2,090)	(4,196)	(2,045)
Total other expense	(5,538)	(4,193)	(12,433)	(9,385)
Arizona Public Service Company
Other income:
Interest income	32	31	105	585
Gain on disposition of property	(58)	91	627	736
Miscellaneous	676	2,491	1,267	7,275
Total other income	650	2,613	1,999	8,596
Other expense:
Non-operating costs	(2,248)	(2,298)	(6,643)	(7,753)
Loss on disposition of property	(327)	(98)	(934)	(565)
Miscellaneous	(1,390)	(830)	(4,191)	(1,439)
Total other expense	$ (3,965)	$ (3,226)	$ (11,768)	$ (9,757)