Summary of Significant Accounting Policies	6 Months Ended
Jun. 30, 2026
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Description of Business The accompanying unaudited consolidated financial statements of Biglari Holdings Inc. have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) applicable to interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In our opinion, all adjustments considered necessary to present fairly the results of the interim periods have been included and consist only of normal recurring adjustments. The results for the interim periods shown are not necessarily indicative of results for the year. The financial statements contained herein should be read in conjunction with the consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2025. Biglari Holdings Inc. is a holding company owning subsidiaries engaged in a number of diverse business activities, including property and casualty insurance and reinsurance, licensing and media, restaurants, and oil and gas. The Company’s largest operating subsidiaries are involved in the franchising and operating of restaurants. Biglari Holdings is founded and led by Sardar Biglari, Chairman and Chief Executive Officer of the Company. Biglari Holdings’ management system combines decentralized operations with centralized financial decision-making. Operating decisions for the various business units are made by their respective managers. All major investment and capital allocation decisions are made for the Company and its subsidiaries by Mr. Biglari. Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, including Steak n Shake Inc., Western Sizzlin Corporation, First Guard Insurance Company, Maxim Inc., Southern Pioneer Property & Casualty Insurance Company, Biglari Reinsurance Ltd., Southern Oil Company and Abraxas Petroleum Corporation. Intercompany accounts and transactions have been eliminated in consolidation.

The accompanying unaudited consolidated financial statements of Biglari Holdings Inc. have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) applicable to interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In our opinion, all adjustments considered necessary to present fairly the results of the interim periods have been included and consist only of normal recurring adjustments. The results for the interim periods shown are not necessarily indicative of results for the year. The financial statements contained herein should be read in conjunction with the consolidated financial statements and notes thereto included in our annual report on Form 10-K for the year ended December 31, 2025.

Biglari Holdings Inc. is a holding company owning subsidiaries engaged in a number of diverse business activities, including property and casualty insurance and reinsurance, licensing and media, restaurants, and oil and gas. The Company’s largest operating subsidiaries are involved in the franchising and operating of restaurants. Biglari Holdings is founded and led by Sardar Biglari, Chairman and Chief Executive Officer of the Company.

Biglari Holdings’ management system combines decentralized operations with centralized financial decision-making. Operating decisions for the various business units are made by their respective managers. All major investment and capital allocation decisions are made for the Company and its subsidiaries by Mr. Biglari.

The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries, including Steak n Shake Inc., Western Sizzlin Corporation, First Guard Insurance Company, Maxim Inc., Southern Pioneer Property & Casualty Insurance Company, Biglari Reinsurance Ltd., Southern Oil Company and Abraxas Petroleum Corporation. Intercompany accounts and transactions have been eliminated in consolidation.