Deferred Compensation Plans - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018	Dec. 28, 2018
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Trading securities held in deferred compensation plan		$ 70,765,000		$ 70,765,000		$ 57,778,000
Deferred compensation plan	[1]	71,182,000		71,182,000		$ 59,349,000
Change in market value of trust assets		$ 361,000	$ 1,840,000	$ 8,415,000	$ 2,577,000
Maximum
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Percentage of compensation deferred				100.00%

[1] Included in accrued payroll and employee benefits and deferred compensation plan liabilities on the Company’s unaudited condensed consolidated balance sheet.