Deferred Compensation Plans - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Dec. 28, 2018
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Trading securities	$ 71,744,000		$ 57,778,000
Deferred compensation plan vested amounts due	73,119,000		$ 59,349,000
Change in market value of trust assets	$ 5,869,000	$ (305,000)
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of compensation deferred	100.00%