Other Income and Other Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Other income:
Interest income	$ 110	$ 251
Miscellaneous	125	2,116
Total other income	235	2,367
Other expense:
Non-operating costs	(2,249)	(2,372)
Investment losses — net	(495)	(140)
Miscellaneous	(1,542)	(2,172)
Total other expense	(4,286)	(4,684)
Arizona Public Service Company
Other income:
Interest income	67	138
Miscellaneous	572	2,624
Total other income	639	2,762
Other expense:
Non-operating costs	(2,517)	(2,587)
Asset dispositions	(643)	(183)
Miscellaneous	(2,194)	(2,286)
Total other expense	$ (5,354)	$ (5,056)