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Sum of investments and unrestricted cash as of the balance sheet date.

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Fair Value Hierarchy for Financial Assets (Cash Equivalents and Investments) Measured at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013	Jan. 28, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 410,697	$ 418,933	$ 509,119	$ 719,545
Short-term investments		10,002us-gaap_ShortTermInvestments
Total	410,697us-gaap_InvestmentsAndCash	428,935us-gaap_InvestmentsAndCash
Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	370,692	330,013
Money-market
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	40,005	25,696
Treasury bills
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		63,224
Short-term investments		10,002
Fair Value, Measurements, Recurring \| Quoted Market Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	410,697	418,933
Short-term investments		10,002
Total	410,697	428,935
Fair Value, Measurements, Recurring \| Quoted Market Prices in Active Markets for Identical Assets (Level 1) \| Cash
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	370,692	330,013
Fair Value, Measurements, Recurring \| Quoted Market Prices in Active Markets for Identical Assets (Level 1) \| Money-market
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	40,005	25,696
Fair Value, Measurements, Recurring \| Quoted Market Prices in Active Markets for Identical Assets (Level 1) \| Treasury bills
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents		63,224
Short-term investments		$ 10,002