Deferred Compensation Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 28, 2018	Dec. 29, 2017	Dec. 30, 2016
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Trading securities	$ 57,778,000	$ 53,350,000
Deferred compensation plan vested amounts due	59,349,000	59,050,000
Change in market value of trust assets	$ (3,900,000)	$ 6,547,000	$ 3,861,000
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of compensation deferred	100.00%