v3.5.0.2
Assets and Liabilities that are Measured at Fair Value on a Recurring Basis (Detail) - Items measured at fair value - USD ($)
$ in Thousands
Jul. 30, 2016
Jan. 30, 2016
Assets    
Total assets $ 1,005,982 $ 1,625,441
Other non-current assets | Severance Pay Fund    
Assets    
Other non-current asset 699 678
Foreign currency forward contracts    
Liabilities    
Accrued liabilities   195
Foreign currency forward contracts | Prepaid expenses and other current assets    
Assets    
Prepaid expenses and other current assets 210 30
Cash equivalents | U.S. government and agency debt    
Assets    
Cash equivalents   184,374
Cash equivalents | Money market funds    
Assets    
Cash equivalents 17,946 160,400
Cash equivalents | Time deposits    
Assets    
Cash equivalents 50,561 209,405
Cash equivalents | Municipal Debt Securities    
Assets    
Cash equivalents 9,740  
Cash equivalents | Corporate debt securities    
Assets    
Cash equivalents 12,595 54,689
Short-term Investments | U.S. government and agency debt    
Assets    
Investments 206,276 317,405
Short-term Investments | Time deposits    
Assets    
Investments 125,000  
Short-term Investments | Municipal Debt Securities    
Assets    
Investments 28,910 31,249
Short-term Investments | Corporate debt securities    
Assets    
Investments 478,848 557,821
Short-term Investments | Asset-backed securities    
Assets    
Investments 51,608 76,736
Short-term Investments | Foreign government and agency debt    
Assets    
Investments 14,615 21,358
Long-term investments | Auction rate securities    
Assets    
Investments 8,974 11,296
Level 1    
Assets    
Total assets 224,222 662,179
Level 1 | Cash equivalents | U.S. government and agency debt    
Assets    
Cash equivalents   184,374
Level 1 | Cash equivalents | Money market funds    
Assets    
Cash equivalents 17,946 160,400
Level 1 | Short-term Investments | U.S. government and agency debt    
Assets    
Investments 206,276 317,405
Level 2    
Assets    
Total assets 772,786 951,966
Level 2 | Other non-current assets | Severance Pay Fund    
Assets    
Other non-current asset 699 678
Level 2 | Foreign currency forward contracts    
Liabilities    
Accrued liabilities   195
Level 2 | Foreign currency forward contracts | Prepaid expenses and other current assets    
Assets    
Prepaid expenses and other current assets 210 30
Level 2 | Cash equivalents | Time deposits    
Assets    
Cash equivalents 50,561 209,405
Level 2 | Cash equivalents | Municipal Debt Securities    
Assets    
Cash equivalents 9,740  
Level 2 | Cash equivalents | Corporate debt securities    
Assets    
Cash equivalents 12,595 54,689
Level 2 | Short-term Investments | Time deposits    
Assets    
Investments 125,000  
Level 2 | Short-term Investments | Municipal Debt Securities    
Assets    
Investments 28,910 31,249
Level 2 | Short-term Investments | Corporate debt securities    
Assets    
Investments 478,848 557,821
Level 2 | Short-term Investments | Asset-backed securities    
Assets    
Investments 51,608 76,736
Level 2 | Short-term Investments | Foreign government and agency debt    
Assets    
Investments 14,615 21,358
Level 3    
Assets    
Total assets 8,974 11,296
Level 3 | Long-term investments | Auction rate securities    
Assets    
Investments $ 8,974 $ 11,296