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[Axis] Location, Statement of Income, Balance [Axis] Restricted cash in other long-term assets Restricted Cash and Cash Equivalent Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Payments on note payable Repayments of Notes Payable Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Other income Other Income and Expenses [Abstract] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Common stock authorized (in shares) Common Stock, Shares Authorized Exercise Price Award Exercise Price Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Related Party Transaction [Axis] Related Party Transaction [Axis] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Segment Reporting [Line Items] Segment Reporting [Line Items] Document Quarterly Report Document Quarterly Report 2027 Lessor, Operating Lease, Payment to be Received, Year One Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Segments [Domain] Segments [Domain] Sales of investments and redemptions of fixed maturity securities Proceeds from Sale of Debt Securities, Available-for-Sale Investment partnerships at cost Investment Owned, Cost Note Payable and Lines of Credit Debt Disclosure [Text Block] Prior accident years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Management fee expense Management Fee Expense Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Lease Contractual Term [Axis] Lease Contractual Term [Axis] Investment partnerships Equity Method Investments Equity Component [Domain] Equity Component [Domain] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount After 2030 Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Finance obligations Finance Obligations, Current Finance Obligations, Current Buildings Buildings and Improvements, Gross Total costs and expenses Costs and Expenses Adoption Date Trading Arrangement Adoption Date Finance leases Finance Lease, Weighted Average Discount Rate, Percent Amortized rate (as a percent) Debt, Annual Principal Payment Percent Debt, Annual Principal Payment Percent Contributions (net of distributions) Payments to Acquire Equity Method Investments Counterparty Name [Domain] Counterparty Name [Domain] Stated rate (as a percent) Debt Instrument, Interest Rate, Stated Percentage Biglari Holdings Inc. shareholders’ equity Beginning balance Ending balance Equity, Attributable to Parent Total other income (expenses) Nonoperating Income (Expense) Entity Listings, Exchange [Axis] Entity Listings, Exchange [Axis] Schedule of Carrying Value of Investment Partnerships Net of Deferred Taxes Carrying Value of Investment Partnerships Net of Deferred Taxes [Table Text Block] Equity securities Equity Securities, FV-NI, Current Assets Assets [Abstract] Lease Rights Contractual Rights [Member] Title Trading Arrangement, Individual Title Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Accounting Policies [Abstract] Accounting Policies [Abstract] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Total lease liabilities Operating Lease, Liability Operating and variable lease costs Operating And Variable Lease, Cost Operating And Variable Lease, Cost Insider Trading Policies and Procedures [Line Items] Total lease liabilities Finance Lease, Liability Accounts Payable and Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Selling, general and administrative Selling, general and administrative Selling, General and Administrative Expense Current accident year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Total Insurance losses Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Operating lease income Operating Lease, Lease Income Construction in progress Construction in Progress, Gross Equivalent Class A 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[Member] Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] City Area Code City Area Code Total lease payments Finance Lease, Liability, to be Paid Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Document Information [Table] Document Information [Table] All Individuals All Individuals [Member] Southern Pioneer Southern Pioneer [Member] Name Forgone Recovery, Individual Name Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Distributions (net of contributions) Distributions (Net of Contributions) Distributions (Net of Contributions) Statement [Line Items] Statement [Line Items] Total assets Total assets Assets Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Entity [Domain] Entity [Domain] Investment gains (losses) Investment Income, Net, Adjustment To Revenue Investment Income, Net, Adjustment To Revenue Oil And Gas Segment Oil And Gas Segment [Member] 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financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Tax expense (benefit) Equity Method Investments, Tax Expense (Benefit), Amount Equity Method Investments, Tax Expense (Benefit), Amount Incentive payments accrued Incentive Fee Expense Proceeds from line of credit Proceeds from Long-Term Lines of Credit Lease Contractual Term [Domain] Lease Contractual Term [Domain] Adjustments to reconcile net earnings (loss) to operating cash flows: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] 2029 Long-Term Debt, Maturity, Year Three Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Total revenues Restaurant operations Revenue Revenue from Contract with Customer, Excluding Assessed Tax Property and equipment Property and equipment, net Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization Operating cash flows from finance leases Operating Cash Flows From Finance Leases Operating Cash Flows From Finance Leases Current portion of lease obligations Notes Payable, Current [Abstract] Asset held for sale Disposal Group, Including Discontinued Operation, Assets, Current Schedule of Financial Information Equity Method Investments [Table Text Block] Subleases Subleases [Member] Subleases Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Goodwill and Other Intangible Assets Intangible Asset and Goodwill [Text Block] Underlying Securities Award Underlying Securities Amount Intangibles Intangible Asset, Excluding Goodwill, before Accumulated Amortization Restaurant Operations Revenues Revenue from Contract with Customer [Text Block] Issuance of common stock Stock Issued During Period, Value, New Issues Subsegments [Domain] Subsegments [Domain] Subsegments [Axis] Subsegments [Axis] Operating leases Operating Lease, Weighted Average Discount Rate, Percent Segment Reporting [Table] Segment Reporting [Table] Schedule of Maturities of Long-Term Debt Schedule of Maturities of Long-Term Debt [Table Text Block] Schedule of Related Party Transactions, by Related Party [Table] Related Party Transaction [Table] Schedule of Equity Method Investments [Table] Equity Method Investment [Table] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Schedule of Lease Cost Lease, Cost [Table Text Block] Other current assets Other Assets, Current Change in foreign exchange rates Effect Of Exchange Rate On Other Intangible Assets, Net Effect Of Exchange Rate On Other Intangible Assets, Net Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] All Trading Arrangements All Trading Arrangements [Member] Other Performance Measure, Amount Other Performance Measure, Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Current Fiscal Year End Date Current Fiscal Year End Date Remainder of 2026 Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Contribution to net earnings (loss) Net Earnings (Loss) Related Party Transaction [Domain] Related Party Transaction [Domain] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Entity File Number Entity File Number Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Initial franchise partner fee Initial Franchise Partner Fee Initial Franchise Partner Fee Schedule of Reconciliation of Changes in Claim Liabilities, Net of Reinsurance Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Impairments Asset, Impairment Loss Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Common stock issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Cash paid for amounts included in the measurement of lease liabilities: Cash Flow, Operating Activities, Lessee [Abstract] Asset retirement obligations Asset Retirement Obligations, Noncurrent Equity Components [Axis] Equity Components [Axis] Depreciation, amortization and impairment Depreciation, Amortization and Impairment Depreciation, Amortization and Impairment Land and leasehold improvements Land And Leasehold Improvements Land And Leasehold Improvements Related Party Related Party [Member] Gain on sale of oil and gas properties Gain on sale of oil and gas properties Gain (Loss) on Disposition of Oil and Gas Property Product and Service [Domain] Product and Service [Domain] Southern Oil Southern Oil [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Common Class A Common Class A [Member] Entity Interactive Data Current Entity Interactive Data Current Finance lease liabilities Finance Lease, Liability, Current Equivalent class A common stock outstanding (in shares) Equivalent Class A Common Stock Outstanding Deferred taxes Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Accounts payable and accrued expenses Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities, Current Entity Small Business Entity Small Business Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Unearned premiums Unearned Premiums 2029 Lessee, Operating Lease, Liability, to be Paid, Year Three Termination Date Trading Arrangement Termination Date Property, Plant, and Equipment [Line Items] Property, Plant, and Equipment [Line Items] Bonds Securities Borrowed, Fair Value Disclosure Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] After 2029 Lessor, Operating Lease, Payment To Be Received, After Year Four Lessor, Operating Lease, Payment To Be Received, After Year Four MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Current accident year Current Year Claims and Claims Adjustment Expense Other assets Other Assets, Noncurrent 2029 Finance Lease, Liability, to be Paid, Year Three Document Type Document Type Fair Value as of Grant Date Award Grant Date Fair Value Schedule of Intangible Asset, Indefinite-Lived Intangible Asset, Indefinite-Lived [Table Text Block] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Earnings Per Share, Basic, by Common Class, Including Two Class Method [Table] Earnings Per Share, Basic, by Common Class, Including Two-Class Method [Table] Gains on sale of assets Gain on sale of assets Gain (Loss) on Disposition of Assets Schedule of Goodwill [Table] Goodwill [Table] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Impairment of intangible assets Intangible Asset, Excluding Goodwill, Impairment Loss Changes in proportionate share of Company stock held Increase (Decrease) In Proportionate Share Of Company Stock Held Arrangement Duration Trading Arrangement Duration Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Local Phone Number Local Phone Number Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Western Sizzlin Western Sizzlin [Member] Schedule of Fair Value and Carrying Value of our Partnership Interest Fair Value and Carrying Value of Partnership Interest [Table Text Block] Earnings (loss) before income taxes Total operating businesses Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Total revenues Revenues Increase (Decrease) In Equity Method Investments [Roll Forward] Increase (Decrease) In Equity Method Investments [Roll Forward] Increase (Decrease) In Equity Method Investments Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Biglari Holdings line of credit Biglari Holdings Lines of Credit [Member] Biglari Holdings Lines of Credit Total property and equipment Property, Plant, and Equipment, before Accumulated Depreciation, Depletion, and Amortization Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Equipment Fixtures and Equipment, Gross Investment partnership gains (losses) Investment partnership gains (losses) Income (Loss) from Equity Method Investments Finite-lived Intangible Assets [Roll Forward] Intangible Asset, Finite-Lived [Roll Forward] Changes in accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Executive Category: Executive Category [Axis] Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Counterparty Name [Axis] Counterparty Name [Axis] Goodwill [Roll Forward] Goodwill [Roll Forward] Liabilities and shareholders’ equity Liabilities and Equity [Abstract] Trade Names Trade Names [Member] 2030 Lessor, Operating Lease, Payment to be Received, Year Four Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Inventories Inventory, Net All Award Types Award Type [Domain] Non-PEO NEO Average 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NYSE TEXAS, INC. 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