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Schedule I - Condensed Financial Information of Parent Company - Statements of Earnings (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items] |  |  |
Operating Revenues | $ 2,249,555 | $ 1,779,873 | $ 1,523,012
Operating Expenses | 1,855,795 | 1,471,720 | 1,237,731
Operating income | 393,760 | 308,153 | 285,281
Other Income and Deductions: |  |  |
Other income | 21,601 | 20,200 | 19,973
Net other income and (deductions) | (54,542) | 33,153 | 37,063
Interest Charges | 127,908 | 96,877 | 114,392
Earnings before Income Taxes | 211,310 | 244,429 | 207,952
Income taxes (benefit) | 26,130 | 32,582 | 20,636
PNM Resources |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Operating Revenues | 0 | 0 | 0
Operating Expenses | 6,199 | 15,044 | 28,299
Operating income | (6,199) | (15,044) | (28,299)
Other Income and Deductions: |  |  |
Equity in earnings of subsidiaries | 197,860 | 221,004 | 211,291
Other income | 663 | 362 | (269)
Net other income and (deductions) | 198,523 | 221,366 | 211,022
Interest Charges | 30,430 | 11,986 | 19,078
Earnings before Income Taxes | 161,894 | 194,336 | 163,645
Income taxes (benefit) | (7,636) | (1,493) | (9,130)
Net earnings | $ 169,530 | $ 195,829 | $ 172,775

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