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Investment Partnerships - Narrative (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Dec. 31, 2024
Schedule of Equity Method Investments [Line Items] |  |  |
Deferred tax liability related to investment partnerships | $ 30,030,000 |  | $ 17,255,000
Incentive reallocation fee | $ 0 | $ 0 |
Biglari Entities |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Incentive reallocation fee, percentage | 25.00% |  |
Hurdle rate, percentage | 6.00% |  |
Investment Partnerships |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Investment partnerships at cost | $ 441,409,000 |  | $ 438,598,000

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