Leases - Lease Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2024	Dec. 27, 2023	Dec. 28, 2022
Finance lease costs:
Amortization of right-of-use assets	$ 1,350	$ 1,451	$ 1,704
Interest on lease liabilities	1,990	2,139	2,350
Sublease income:
Total lease costs	14,283	13,477	11,183
Occupancy
Operating lease costs:
Operating lease costs	8,828	8,584	7,624
Variable lease costs:
Variable lease costs	4,716	4,789	3,988
Costs of franchise and license revenue
Operating lease costs:
Operating lease costs	12,702	14,022	15,541
Variable lease costs:
Variable lease costs	5,979	6,232	6,596
General and administrative expenses
Operating lease costs:
Operating lease costs	739	629	564
Variable lease costs:
Variable lease costs	333	271	255
Other operating expenses
Operating lease costs:
Operating lease costs	459	257	0
Variable lease costs:
Variable lease costs	6	14	0
Restructuring charges and exit costs
Operating lease costs:
Operating lease costs	125	175	201
Variable lease costs:
Variable lease costs	65	46	34
Sublease income:
Sublease income	(192)	(166)	(229)
Franchise and license revenue
Sublease income:
Sublease income	$ (22,817)	$ (24,966)	$ (27,445)