Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)		Jul. 03, 2020	Jan. 03, 2020
Assets
Trading securities held in deferred compensation plan		$ 75,138,000	$ 75,934,000
Total		172,382,000	172,310,000
Liabilities
Deferred compensation plan	[1]	75,807,000	76,357,000
Total		75,807,000	76,357,000
Money market securities
Assets
Money market securities	[2]	63,024,000	41,211,000
Fixed income securities
Assets
Fixed income available-for-sale securities	[3]	34,220,000	55,165,000
Trading securities held in deferred compensation plan	[4]	26,524,000	22,010,000
Equity securities
Assets
Trading securities held in deferred compensation plan	[4]	48,614,000	53,924,000
Fair Value, Inputs, Level 1
Assets
Total		138,162,000	117,145,000
Liabilities
Deferred compensation plan	[1]	75,807,000	76,357,000
Total		75,807,000	76,357,000
Fair Value, Inputs, Level 1 | Money market securities
Assets
Money market securities	[2]	63,024,000	41,211,000
Fair Value, Inputs, Level 1 | Fixed income securities
Assets
Fixed income available-for-sale securities	[3]	0	0
Trading securities held in deferred compensation plan	[4]	26,524,000	22,010,000
Fair Value, Inputs, Level 1 | Equity securities
Assets
Trading securities held in deferred compensation plan	[4]	48,614,000	53,924,000
Fair Value, Inputs, Level 2
Assets
Total		34,220,000	55,165,000
Liabilities
Deferred compensation plan	[1]	0	0
Total		0	0
Fair Value, Inputs, Level 2 | Money market securities
Assets
Money market securities	[2]	0	0
Fair Value, Inputs, Level 2 | Fixed income securities
Assets
Fixed income available-for-sale securities	[3]	34,220,000	55,165,000
Trading securities held in deferred compensation plan	[4]	0	0
Fair Value, Inputs, Level 2 | Equity securities
Assets
Trading securities held in deferred compensation plan	[4]	0	0
Fair Value, Inputs, Level 3
Assets
Total		0	0
Liabilities
Deferred compensation plan	[1]	0	0
Total		0	0
Fair Value, Inputs, Level 3 | Money market securities
Assets
Money market securities	[2]	0	0
Fair Value, Inputs, Level 3 | Fixed income securities
Assets
Fixed income available-for-sale securities	[3]	0	0
Trading securities held in deferred compensation plan	[4]	0	0
Fair Value, Inputs, Level 3 | Equity securities
Assets
Trading securities held in deferred compensation plan	[4]	$ 0	$ 0

[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 cash and cash equivalents on the Company’s unaudited condensed consolidated balance sheet.

[3] Included in short-term investments on the Company’s unaudited condensed consolidated balance sheet.

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