Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Oct. 03, 2014		Jan. 03, 2014
Assets
Money market securities	$ 44,246	[1]	$ 37,099	[2]
Total	112,353		108,249
Liabilities
Deferred compensation plan	43,832	[3]	37,926	[4]
Total	43,832		37,926
Fixed income securities
Assets
Fixed income available for sale securities	26,009	[5]	33,171	[6]
Fixed income trading securities held in deferred compensation plan	9,759	[7]	9,535	[8]
Equity securities
Assets
Equity trading securities held in deferred compensation plan	32,339	[7]	28,444	[8]
Fair Value, Inputs, Level 1
Assets
Money market securities	44,246	[1]	37,099	[2]
Total	86,344		75,078
Liabilities
Deferred compensation plan	43,832	[3]	37,926	[4]
Total	43,832		37,926
Fair Value, Inputs, Level 1 | Fixed income securities
Assets
Fixed income available for sale securities	0	[5]	0	[6]
Fixed income trading securities held in deferred compensation plan	9,759	[7]	9,535	[8]
Fair Value, Inputs, Level 1 | Equity securities
Assets
Equity trading securities held in deferred compensation plan	32,339	[7]	28,444	[8]
Fair Value, Inputs, Level 2
Assets
Money market securities	0	[1]	0	[2]
Total	26,009		33,171
Liabilities
Deferred compensation plan	0	[3]	0	[4]
Total	0		0
Fair Value, Inputs, Level 2 | Fixed income securities
Assets
Fixed income available for sale securities	26,009	[5]	33,171	[6]
Fixed income trading securities held in deferred compensation plan	0	[7]	0	[8]
Fair Value, Inputs, Level 2 | Equity securities
Assets
Equity trading securities held in deferred compensation plan	0	[7]	0	[8]
Fair Value, Inputs, Level 3
Assets
Money market securities	0	[1]	0	[2]
Total	0		0
Liabilities
Deferred compensation plan	0	[3]	0	[4]
Total	0		0
Fair Value, Inputs, Level 3 | Fixed income securities
Assets
Fixed income available for sale securities	0	[5]	0	[6]
Fixed income trading securities held in deferred compensation plan	0	[7]	0	[8]
Fair Value, Inputs, Level 3 | Equity securities
Assets
Equity trading securities held in deferred compensation plan	$ 0	[7]	$ 0	[8]

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

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

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

[4] Included in accrued payroll and employee benefits and deferred compensation on the Company’s consolidated balance sheet.

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

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

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

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