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Other Income and Other Expense (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other income: |  |  |
Interest income | $ 10,377 | $ 8,647 | $ 3,497
Miscellaneous | 63 | 96 | 155
Total other income | 50,263 | 24,896 | 4,006
Other expense: |  |  |
Non-operating costs | (10,663) | (10,076) | (11,749)
Investment losses — net | (1,835) | (417) | (4,113)
Miscellaneous | (5,382) | (7,473) | (5,677)
Total other expense | (17,880) | (17,966) | (21,539)
ARIZONA PUBLIC SERVICE COMPANY |  |  |
Other income: |  |  |
Interest income | 6,998 | 6,496 | 2,504
Miscellaneous | 63 | 97 | 155
Total other income | 46,884 | 22,746 | 3,013
Other expense: |  |  |
Non-operating costs | (9,612) | (9,462) | (10,825)
Miscellaneous | (3,378) | (5,830) | (3,088)
Total other expense | (12,990) | (15,292) | (13,913)
SCR deferral |  |  |
Other income: |  |  |
Debt return on Four Corners SCR (Note 4) | 19,541 | 16,153 | 354
SCR deferral | ARIZONA PUBLIC SERVICE COMPANY |  |  |
Other income: |  |  |
Debt return on Four Corners SCR (Note 4) | 19,541 | 16,153 | 354
Octotillo deferral |  |  |
Other income: |  |  |
Debt return on Four Corners SCR (Note 4) | 20,282 |  | 0
Octotillo deferral | ARIZONA PUBLIC SERVICE COMPANY |  |  |
Other income: |  |  |
Debt return on Four Corners SCR (Note 4) | $ 20,282 | $ 0 | $ 0

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