Additional Balance Sheet Information - Composition of property and equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 26, 2019
Property, Plant and Equipment, Gross	$ 1,521,906	$ 1,533,832
Less accumulated depreciation and amortization	673,578	610,578
Net property and equipment	848,328	923,254
Land improvements
Property, Plant and Equipment, Gross	145,671	152,434
Buildings and improvements
Property, Plant and Equipment, Gross	759,421	761,511
Leasehold improvements
Property, Plant and Equipment, Gross	163,879	164,083
Furniture, fixtures and equipment
Property, Plant and Equipment, Gross	374,253	377,404
Finance lease right-of-use assets
Property, Plant and Equipment, Gross	75,322	74,357
Construction in progress
Property, Plant and Equipment, Gross	$ 3,360	$ 4,043