Other Income and Other Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other income:
Interest income	$ 103	$ 116	$ 849	$ 1,291
Miscellaneous	2,263	44	6,665	96
Total other income	2,366	160	7,514	1,387
Other expense:
Non-operating costs	(1,985)	(2,028)	(6,976)	(5,951)
Investment losses — net	(118)	(3,435)	(364)	(3,643)
Miscellaneous	(2,090)	(1,972)	(2,045)	(3,827)
Total other expense	(4,193)	(7,435)	(9,385)	(13,421)
Arizona Public Service Company
Other income:
Interest income	31	2	585	1,061
Miscellaneous	2,582	719	8,011	1,951
Total other income	2,613	721	8,596	3,012
Other expense:
Non-operating costs	(2,298)	(2,263)	(7,753)	(6,868)
Asset dispositions	(98)	(1,203)	(565)	(3,864)
Miscellaneous	(830)	(1,149)	(1,439)	(5,023)
Total other expense	$ (3,226)	$ (4,615)	$ (9,757)	$ (15,755)