Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 02, 2013	Jan. 28, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 52,669	$ 70,778
Deferred compensation plan (long-term)	5,488	4,410	[1]
Money market funds (cash equivalent)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	44,781	52,553
Municipal Bonds | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	6,158	16,503	[1]
Auction rate securities | Long-term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	1,730	1,722
Quoted Prices in Active Markets for Identical Items (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	44,781	52,553
Quoted Prices in Active Markets for Identical Items (Level 1) | Money market funds (cash equivalent)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	44,781	52,553
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	6,158	16,503
Deferred compensation plan (long-term)	5,488	4,410	[1]
Significant Other Observable Inputs (Level 2) | Municipal Bonds | Short-term Investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	6,158	16,503	[1]
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	1,730	1,722
Significant Unobservable Inputs (Level 3) | Auction rate securities | Long-term
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets, fair value	$ 1,730	$ 1,722

[1] In the third quarter of fiscal 2011, municipal bonds and deferred compensation plan amounts were reclassified to Level 2 upon further interpretation.