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Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | $ (13,551) | $ 18,375 | $ 11,624
State |  |  |  |  |  |  |  |  | 3,195 | 3,342 | 3,052
Total current |  |  |  |  |  |  |  |  | (10,356) | 21,717 | 14,676
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (14,982) | 94,721 | 223,729
State |  |  |  |  |  |  |  |  | 9,565 | 17,464 | 19,867
Total deferred |  |  |  |  |  |  |  |  | (5,417) | 112,185 | 243,596
Income tax expense/(benefit) | $ (88,537) | $ 53,266 | $ 17,080 | $ 2,418 | $ 6,795 | $ 84,333 | $ 44,039 | $ (1,265) | (15,773) | 133,902 | 258,272
ARIZONA PUBLIC SERVICE COMPANY |  |  |  |  |  |  |  |  |  |  |
Current: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | (54,697) | 88,180 | 21,512
State |  |  |  |  |  |  |  |  | 695 | 1,877 | 2,778
Total current |  |  |  |  |  |  |  |  | (54,002) | 90,057 | 24,290
Deferred: |  |  |  |  |  |  |  |  |  |  |
Federal |  |  |  |  |  |  |  |  | 29,321 | 32,436 | 221,078
State |  |  |  |  |  |  |  |  | 15,109 | 22,321 | 23,800
Total deferred |  |  |  |  |  |  |  |  | 44,430 | 54,757 | 244,878
Income tax expense/(benefit) |  |  |  |  |  |  |  |  | $ (9,572) | $ 144,814 | $ 269,168

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