Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 02, 2015		Jan. 02, 2015
Assets
Money market securities	$ 3,608	[1]	$ 45,478	[2]
Total	71,729		114,239
Liabilities
Deferred compensation plan	45,038	[3]	45,394	[4]
Total	45,038		45,394
Fixed income securities
Assets
Fixed income available-for-sale securities	26,837	[5]	24,913	[6]
Fixed income trading securities held in deferred compensation plan	9,007	[7]	9,672	[8]
Equity securities
Assets
Equity trading securities held in deferred compensation plan	32,277	[7]	34,176	[8]
Fair Value, Inputs, Level 1
Assets
Money market securities	3,608	[1]	45,478	[2]
Total	44,892	[1]	89,326	[2]
Liabilities
Deferred compensation plan	45,038	[1],[3]	45,394	[2],[4]
Total	45,038	[1]	45,394	[2]
Fair Value, Inputs, Level 1 | Fixed income securities
Assets
Fixed income available-for-sale securities	0	[1],[5]	0	[2],[6]
Fixed income trading securities held in deferred compensation plan	9,007	[1],[7]	9,672	[2],[8]
Fair Value, Inputs, Level 1 | Equity securities
Assets
Equity trading securities held in deferred compensation plan	32,277	[1],[7]	34,176	[2],[8]
Fair Value, Inputs, Level 2
Assets
Money market securities	0	[1],[5]	0	[2],[6]
Total	26,837	[5]	24,913	[6]
Liabilities
Deferred compensation plan	0	[3],[5]	0	[4],[6]
Total	0	[5]	0	[6]
Fair Value, Inputs, Level 2 | Fixed income securities
Assets
Fixed income available-for-sale securities	26,837	[5]	24,913	[6]
Fixed income trading securities held in deferred compensation plan	0	[5],[7]	0	[6],[8]
Fair Value, Inputs, Level 2 | Equity securities
Assets
Equity trading securities held in deferred compensation plan	0	[5],[7]	0	[6],[8]
Fair Value, Inputs, Level 3
Assets
Money market securities	0	[1],[7]	0	[2],[8]
Total	0	[7]	0	[8]
Liabilities
Deferred compensation plan	0	[3],[7]	0	[4],[8]
Total	0	[7]	0	[8]
Fair Value, Inputs, Level 3 | Fixed income securities
Assets
Fixed income available-for-sale securities	0	[5],[7]	0	[6],[8]
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.