Other Income and Other Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Other income:
Interest income	$ 117	$ 110
Miscellaneous	0	125
Total other income	117	235
Other expense:
Non-operating costs	(2,049)	(2,249)
Investment losses — net	(518)	(495)
Miscellaneous	(1,471)	(1,542)
Total other expense	(4,038)	(4,286)
Arizona Public Service Company
Other income:
Interest income	73	67
Gain on disposition of property	332	207
Miscellaneous	205	365
Total other income	610	639
Other expense:
Non-operating costs	(1,966)	(2,517)
Loss on disposition of property	(426)	(643)
Miscellaneous	(2,358)	(2,194)
Total other expense	$ (4,750)	$ (5,354)