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Schedule I - Condensed Financial Information of Registrant - Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
CONDENSED FINANCIAL STATEMENTS |  |  |
Operating expenses | $ 3,871,351 | $ 3,592,474 | $ 2,998,525
Other |  |  |
Total | 102,376 | 99,281 | 173,982
Interest expense | 374,887 | 283,569 | 254,314
Income tax benefit | 76,912 | 74,827 | 110,086
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | 501,557 | 483,602 | 618,720
Other comprehensive income (loss) — attributable to common shareholders | (1,709) | 23,426 | 7,935
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | 499,848 | 507,028 | 626,655
Pinnacle West |  |  |
CONDENSED FINANCIAL STATEMENTS |  |  |
Operating expenses | 11,249 | 8,850 | 10,245
Other |  |  |
Equity in earnings of subsidiaries | 539,962 | 500,042 | 628,916
Other income (expense) | 2,823 | (4,725) | (4,919)
Total | 542,785 | 495,317 | 623,997
Interest expense | 47,251 | 18,861 | 10,672
Income before income taxes | 484,285 | 467,606 | 603,080
Income tax benefit | (17,272) | (15,996) | (15,640)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | 501,557 | 483,602 | 618,720
Other comprehensive income (loss) — attributable to common shareholders | (1,709) | 23,426 | 7,935
COMPREHENSIVE INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS | $ 499,848 | $ 507,028 | $ 626,655

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