Fair Value Measurments - Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis (Detail) (Fair Value, Measurements, Recurring, USD $) In Thousands, unless otherwise specified	May 02, 2015	Jan. 31, 2015	May 03, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure, Recurring	$ 13,822	$ 12,443	$ 11,599
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure, Recurring	13,822	12,443	11,599
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure, Recurring	0	0	0
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Assets, Fair Value Disclosure, Recurring	0	0	0
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	2,753	3,098	3,188
Equity Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	2,753	3,098	3,188
Equity Securities | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	0	0	0
Equity Securities | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	0	0	0
Fixed Income Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	896	911	806
Fixed Income Funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	896	911	806
Fixed Income Funds | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	0	0	0
Fixed Income Funds | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	0	0	0
Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure		1,410
Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure		1,410
Money Market Funds [Member] | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure		0
Money Market Funds [Member] | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure		0
Equity Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	10,173	7,024	7,605
Equity Funds | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	10,173	7,024	7,605
Equity Funds | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	0	0	0
Equity Funds | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Investments, Fair Value Disclosure	$ 0	$ 0	$ 0