Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jul. 01, 2018	Jun. 30, 2019	Jul. 01, 2018	Dec. 30, 2018	Dec. 31, 2017
Tax Credit Carryforward [Line Items]
Federal and State Income Tax Expense (Benefit), Continuing Operations	$ (2,332)	$ (2,251)	$ 4,566	$ 1,284
Effective income tax rate	18.50%		29.30%	35.10%
Deferred income taxes			$ (309)	$ (3,626)
Unrecognized Tax Benefits	$ 4,200		4,200		$ 4,300	$ 0
Unrecognized tax benefits that would decrease effective tax rate and provision for income taxes, if recognized	3,300		3,300
Expected decrease in unrecognized tax benefits within next twelve months	3,700		3,700
Total amount of interest and penalties accrued related to unrecognized tax benefits	1,200		1,200		$ 1,100	$ 1,000
Foreign Income Tax Expense (Benefit), Continuing Operations	345	77	625	475
Income tax expense (benefit)	$ (1,987)	$ (2,174)	$ 5,191	$ 1,759