Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2017	Dec. 28, 2016	Dec. 30, 2015
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 18,100	$ 16,100	$ 13,100
Gross value of assets under capital leases for buildings and improvements	1,600	1,600
Accumulated depreciation of assets under capital leases	1,500	1,500
Long-lived assets, non-cash impairment charges	$ 32,594	$ 8,400	$ 181