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Investments - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
SERP investments at fair value | $ 3,022 |  | $ 3,022 |  | $ 2,670
CoBank |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |
SERP investments at fair value | 12,400 |  | 12,400 |  | $ 12,100
Other nonoperating income (expense) | $ 800 | $ 400 | $ 2,300 | $ 1,100 |
Percentage of patronage credit paid in cash | 75.00% |  | 75.00% |  |
Percentage of patronage credit paid in share | 25.00% |  | 25.00% |  |

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