Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 01, 2017	Jan. 03, 2016	Dec. 28, 2014
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 7.8	$ 8.3	$ 8.8
Amortization expense	10.2	11.6	11.5
Capital leases, gross	9.9	9.4
Accumulated amortization of capital leases	6.6	5.6
Internal-use software [Member]
Property, Plant and Equipment [Line Items]
Amortization expense	$ 1.1	$ 1.5	$ 1.2