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Other Income and Other Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Other income: |  |  |  |
Interest income | $ 917 | $ 65 | $ 1,782 | $ 370
Investment gains — net | 119 | 0 | 119 | 13
Miscellaneous | 55 | 6 | 154 | 2
Total other income | 1,091 | 71 | 2,055 | 385
Other expense: |  |  |  |
Non-operating costs | (1,978) | (2,502) | (7,338) | (6,636)
Investment losses — net | (231) | (450) | (759) | (1,508)
Miscellaneous | (2,784) | (2,253) | (4,398) | (3,941)
Total other expense | (4,993) | (5,205) | (12,495) | (12,085)
Arizona Public Service Company |  |  |  |
Other income: |  |  |  |
Interest income | 683 | 0 | 1,278 | 181
Gain on disposition of property | 441 | 183 | 1,009 | 5,504
Miscellaneous | 354 | 384 | 1,395 | 1,239
Total other income | 1,478 | 567 | 3,682 | 6,924
Other expense: |  |  |  |
Non-operating costs | (1,970) | (2,714) | (7,889) | (7,398)
Loss on disposition of property | (3,214) | 36 | (4,471) | (1,048)
Miscellaneous | (1,078) | (1,098) | (3,930) | (4,510)
Total other expense | $ (6,262) | $ (3,776) | $ (16,290) | $ (12,956)

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