Deferred Compensation Plans - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended
		Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 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		$ 69,385,000		$ 69,385,000		$ 57,778,000
Deferred compensation plan	[1]	69,742,000		69,742,000		$ 59,349,000
Change in market value of trust assets		$ 2,184,000	$ 1,043,000	$ 8,053,000	$ 737,000
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.