Summary of Significant Accounting Policies - Schedule of Significant Items Included in Other Income (Deductions) (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Other income (deductions) | ||||
| Interest income | $ 3,010 | $ 329 | $ 7,140 | $ 364 |
| Equity in earnings (loss) of unconsolidated investments | (97) | 0 | 1,097 | 0 |
| Equity AFUDC | 4,482 | 2,911 | ||
| Miscellaneous income and (expense) | (38) | (67) | (86) | (209) |
| Total other income (deductions) | 11,295 | 18,068 | 22,286 | 27,263 |
| Southwest Gas Corporation | ||||
| Other income (deductions) | ||||
| Change in COLI policies | 3,600 | 5,500 | 3,300 | 3,800 |
| Interest income | 3,077 | 5,817 | 5,731 | 11,627 |
| Equity AFUDC | 2,449 | 1,558 | 4,482 | 2,911 |
| Other components of net periodic benefit gain | 2,195 | 4,368 | 4,390 | 8,737 |
| Miscellaneous income and (expense) | (2,901) | 563 | (3,768) | 33 |
| Total other income (deductions) | $ 8,420 | $ 17,806 | $ 14,135 | $ 27,108 |
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- Definition Miscellaneous Income (Expense) No definition available.
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- Definition Amount of gain (loss), recognized immediately as component of net periodic benefit (cost) credit, for change in value of benefit obligation or plan assets from experience different from that assumed, change in actuarial assumption, or consequence of temporarily deviating from substantive plan. Includes, but is not limited to, amount in excess of 10 percent of greater of fair value of plan assets or benefit obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of income (loss) for proportionate share of equity method investee's income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of interest income earned from interest bearing assets classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition The change in cash surrender or contract value during the period which adjusted the amount of premiums paid in determining the expense or income recognized under the contract for the period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of income (expense) related to nonoperating activities, classified as other. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- References No definition available.
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- Definition The component of the allowance for funds used during construction during the period based on an assumed rate of return on equity funds used in financing the construction of regulated assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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