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Fair Market Values for Cash and Marketable Securities (Detail) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Jan. 28, 2012
Cash and cash equivalents:        
Cash and cash equivalents $ 410,697us-gaap_CashAndCashEquivalentsAtCarryingValue $ 418,933us-gaap_CashAndCashEquivalentsAtCarryingValue $ 509,119us-gaap_CashAndCashEquivalentsAtCarryingValue $ 719,545us-gaap_CashAndCashEquivalentsAtCarryingValue
Short-term investments:        
Short-term investments   10,002us-gaap_ShortTermInvestments    
Total 410,697us-gaap_InvestmentsAndCash 428,935us-gaap_InvestmentsAndCash    
Cash        
Cash and cash equivalents:        
Cash and cash equivalents 370,692us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_CashMember		 330,013us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_CashMember		    
Treasury bills        
Cash and cash equivalents:        
Cash and cash equivalents   63,224us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember		    
Short-term investments:        
Short-term investments   10,002us-gaap_ShortTermInvestments
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasurySecuritiesMember		    
Money-market        
Cash and cash equivalents:        
Cash and cash equivalents $ 40,005us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_MoneyMarketFundsMember		 $ 25,696us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_InvestmentTypeAxis
= us-gaap_MoneyMarketFundsMember