Impairment of Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2026	Mar. 30, 2025
Impairment of Long-Lived Assets
Impairment of long-lived assets	$ 2,572	$ 1,421
Company-operated restaurants
Impairment of Long-Lived Assets
Impairment of long-lived assets	1,169	1,187
Restaurants leased or subleased to franchisees
Impairment of Long-Lived Assets
Impairment of long-lived assets	1,358	0
Surplus properties
Impairment of Long-Lived Assets
Impairment of long-lived assets	$ 45	$ 234