Net Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Property, Plant and Equipment
Property and equipment, gross	$ 617,357	$ 575,562
Accumulated depreciation and amortization	(386,884)	(361,518)	$ (337,584)
Net property and equipment	230,473	214,044	$ 219,457
Land
Property, Plant and Equipment
Property and equipment, gross	34,009	32,795
Buildings and improvements
Property, Plant and Equipment
Property and equipment, gross	90,892	87,010
Leasehold improvements
Property, Plant and Equipment
Property and equipment, gross	112,815	110,903
Equipment and other
Property, Plant and Equipment
Property and equipment, gross	357,242	333,884
Construction in progress
Property, Plant and Equipment
Property and equipment, gross	$ 22,399	$ 10,970