Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Property Plant And Equipment [Line Items]
Equipment and leasehold improvements	$ 141,595	$ 132,556
Accumulated depreciation and amortization of equipment and leasehold improvements	93,617	82,982
Depreciation and amortization expense, property and equipment	$ 14,840	16,881	$ 18,452
Adjustments
Property Plant And Equipment [Line Items]
Equipment and leasehold improvements		(61,357)
Accumulated depreciation and amortization of equipment and leasehold improvements		$ (10,831)