Business Segment Reporting - Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Revenue	$ 100,619	$ 91,141	$ 195,654	$ 180,592
Operating Segments
Segment Reporting Information [Line Items]
Revenue	100,619	91,141	195,654	180,592
Nonsegment
Segment Reporting Information [Line Items]
Investment partnership gains (losses)	0	0	0	0
Investment gains (losses)	0	0	0	0
Interest expenses not allocated to segments	0	0	0	0
Corporate and other
Segment Reporting Information [Line Items]
Corporate and other	$ 0	$ 0	$ 0	$ 0

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

Biglari Holdings Inc. 10-Q