Property and Equipment (Schedule of Property and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2015	Dec. 27, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 1,833,252	$ 1,752,560
Less accumulated depreciation and amortization	1,094,267	1,035,700
Property and equipment, net	738,985	716,860
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	106,125	103,240
Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	586,903	544,309
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	949,975	911,169
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 190,249	$ 193,842
Maximum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	60 years
Maximum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	12 years
Maximum [Member] | Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Minimum [Member] | Buildings and improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Minimum [Member] | Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Minimum [Member] | Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years