Income Taxes (Details) - Provision for Income Taxes - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Current:
Federal	$ 35,097	$ 34,764	$ 37,168
State	6,693	6,782	8,036
Deferred:
Federal	(288)	1,192	799
State	(756)	(1,253)	(3,294)
Foreign	(955)	(220)	(1,357)
Total income tax expense	$ 39,791	$ 41,265	$ 41,352