Property (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2024	Dec. 27, 2023	Dec. 28, 2022
Property, Plant and Equipment
Total property	$ 271,005	$ 253,373
Less accumulated depreciation	159,588	159,879
Property, net	111,417	93,494
Property held under finance leases, leased to franchisees, net	6,200	6,098
Depreciation expense, including amortization of property under finance leases	12,600	12,200	$ 12,800
Franchise
Property, Plant and Equipment
Total property	86,504	90,588
Less accumulated depreciation	55,699	58,006
Property, net	30,805	32,582
Buildings held under finance leases, leased to franchisees	5,233	5,505
Less accumulated amortization	3,024	3,218
Property held under finance leases, leased to franchisees, net	2,209	2,287
Total property leased to franchisees, net	33,014	34,869
Land
Property, Plant and Equipment
Total property	43,196	43,577
Land | Franchise
Property, Plant and Equipment
Total property	23,166	23,825
Buildings and leasehold improvements
Property, Plant and Equipment
Total property	182,560	169,005
Buildings and leasehold improvements | Franchise
Property, Plant and Equipment
Total property	63,338	66,763
Other property and equipment
Property, Plant and Equipment
Total property	$ 45,249	$ 40,791