Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)	Sep. 27, 2024		Dec. 29, 2023
Assets
Trading securities held in deferred compensation plan	$ 126,794,000		$ 115,187,000
Total	183,663,000		169,873,000
Liabilities
Deferred compensation plan	127,722,000	[1]	116,564,000	[2]
Total	127,722,000		116,564,000
Money market securities
Assets
Money market securities	56,869,000	[3]	54,686,000	[4]
Fixed income securities
Assets
Trading securities held in deferred compensation plan	38,935,000	[5]	36,788,000	[6]
Equity securities
Assets
Trading securities held in deferred compensation plan	87,859,000	[5]	78,399,000	[6]
Fair Value, Inputs, Level 1
Assets
Total	183,663,000		169,873,000
Liabilities
Deferred compensation plan	127,722,000	[1]	116,564,000	[2]
Total	127,722,000		116,564,000
Fair Value, Inputs, Level 1 | Money market securities
Assets
Money market securities	56,869,000	[3]	54,686,000	[4]
Fair Value, Inputs, Level 1 | Fixed income securities
Assets
Trading securities held in deferred compensation plan	38,935,000	[5]	36,788,000	[6]
Fair Value, Inputs, Level 1 | Equity securities
Assets
Trading securities held in deferred compensation plan	87,859,000	[5]	78,399,000	[6]
Fair Value, Inputs, Level 2
Assets
Total	0		0
Liabilities
Deferred compensation plan	0	[1]	0	[2]
Total	0		0
Fair Value, Inputs, Level 2 | Money market securities
Assets
Money market securities	0	[3]	0	[4]
Fair Value, Inputs, Level 2 | Fixed income securities
Assets
Trading securities held in deferred compensation plan	0	[5]	0	[6]
Fair Value, Inputs, Level 2 | Equity securities
Assets
Trading securities held in deferred compensation plan	0	[5]	0	[6]
Fair Value, Inputs, Level 3
Assets
Total	0		0
Liabilities
Deferred compensation plan	0	[1]	0	[2]
Total	0		0
Fair Value, Inputs, Level 3 | Money market securities
Assets
Money market securities	0	[3]	0	[4]
Fair Value, Inputs, Level 3 | Fixed income securities
Assets
Trading securities held in deferred compensation plan	0	[5]	0	[6]
Fair Value, Inputs, Level 3 | Equity securities
Assets
Trading securities held in deferred compensation plan	$ 0	[5]	$ 0	[6]

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

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

[3] Included in cash and cash equivalents on the Company’s unaudited condensed consolidated balance sheet.

[4] Included in cash and cash equivalents on the Company’s unaudited condensed consolidated balance sheet.

[5] Included in prepaid expenses and other current assets and deferred compensation plan assets on the Company’s unaudited condensed consolidated balance sheet.

[6] Included in prepaid expenses and other current assets and deferred compensation plan assets on the Company’s unaudited condensed consolidated balance sheet.