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v3.22.4

Condensed Statements of Income and Comprehensive Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items] |  |  |
Revenues | $ 6,973,864 | $ 5,680,733 | $ 5,532,750
Operating expenses | 6,399,911 | 5,146,514 | 4,987,825
Operating income | 573,953 | 534,219 | 544,925
Other income | 7,379 | 26,416 | 26,711
Interest expense | 119,273 | 93,984 | 96,519
Income before income taxes | 462,059 | 466,651 | 475,117
Income taxes | 94,783 | 88,920 | 84,590
Income from continuing operations | 367,276 | 377,731 | 390,527
Comprehensive income | 377,910 | 385,205 | 384,229
MDU Resources Group, Inc. [Member] |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Revenues | 0 | 0 | 0
Operating expenses | 14,323 | 0 | 0
Operating income | (14,323) | 0 | 0
Other income | 0 | 0 | 0
Interest expense | 0 | 0 | 0
Income before income taxes | (14,323) | 0 | 0
Income taxes | (1,623) | 0 | 0
Equity in earnings of subsidiaries from continuing operations | 379,976 | 377,731 | 390,527
Income from continuing operations | 367,276 | 377,731 | 390,527
Equity in earnings (loss) of subsidiaries from discontinued operations | 213 | 400 | (322)
Net income | 367,489 | 378,131 | 390,205
Comprehensive income | $ 377,910 | $ 385,205 | $ 384,229

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