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Common Stock Options (2002 Equity Incentive Plan) (Details) (USD $)
0 Months Ended 12 Months Ended 0 Months Ended
May 16, 2012
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
May 23, 2012
Jul. 24, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Common Stock, Dividends, Per Share, Cash Paid $ 2.02us-gaap_CommonStockDividendsPerShareCashPaid $ 0us-gaap_CommonStockDividendsPerShareCashPaid $ 0us-gaap_CommonStockDividendsPerShareCashPaid $ 2.02us-gaap_CommonStockDividendsPerShareCashPaid    
2002 Equity Incentive Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares available for issuance (shares)           7,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= five_TwoThousandTwoSeniorManagementEquityIncentivePlanMember
Stock options and restricted shares available for grant (shares)   4,031,938five_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAndNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_PlanNameAxis
= five_TwoThousandTwoSeniorManagementEquityIncentivePlanMember
       
Common Stock, Dividends, Per Share, Cash Paid         $ 2.02us-gaap_CommonStockDividendsPerShareCashPaid
/ us-gaap_PlanNameAxis
= five_TwoThousandTwoSeniorManagementEquityIncentivePlanMember