Store Closing Costs - Schedule of Activity for Company Store Closing Reserves (Detail) - Lease Termination Costs [Member] $ in Thousands	9 Months Ended
	Oct. 01, 2017 USD ($)
Restructuring Cost And Reserve [Line Items]
Balance at January 1, 2017	$ 788
Store closing costs	(137)
Payments	(600)
Balance at October 1, 2017	$ 51