Loss on Asset Disposals and Impairment (Details) - Store Closing Reserve - Facility Closing - USD ($) $ in Thousands	12 Months Ended
	Dec. 25, 2016	Dec. 27, 2015	Dec. 28, 2014
Store Closing Reserve [Roll Forward]
Beginning reserve balance	$ 0	$ 28	$ 13
Store closing costs incurred	298	503	315
Costs paid	(168)	(531)	(300)
Ending reserve balance	$ 130	$ 0	$ 28