Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 30, 2017	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Income Tax Contingency [Line Items]
U.S. corporate income tax rate			35.00%	35.00%	35.00%
Percentage of expense qualified property placed in service	100.00%
Percentage of dividends received deduction on qualifying dividends paid by foreign subsidiaries	100.00%
First significant change in U.S. tax law, period			30 years
Provisional tax expense, net deferred tax assets			$ 4,400,000
Tax on deferred foreign earnings, liquid assets, percentage			15.50%
Tax on deferred foreign earnings, illiquid assets, percentage			8.00%
Defined increments minimum payment period			8 years
Provisional tax expense			$ 0
Net unrecognized tax benefits	$ 2,301,000		2,301,000	$ 3,567,000	$ 1,855,000	$ 1,163,000
Unrecognized tax benefits which would impact effective tax rate if recognized	2,000,000		2,000,000
Accrued interest and penalties related to uncertain tax positions	$ 700,000		$ 700,000
Earliest Tax Year [Member] | State Tax Authority [Member]
Income Tax Contingency [Line Items]
Income tax years under examination			2011
Latest Tax Year [Member] | State Tax Authority [Member]
Income Tax Contingency [Line Items]
Income tax years under examination			2012
Scenario, Forecast [Member]
Income Tax Contingency [Line Items]
U.S. corporate income tax rate		21.00%