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SHARE-BASED COMPENSATION (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Jun. 17, 2008
Share-based compensation        
Compensation cost (in dollars) $ 2,502us-gaap_AllocatedShareBasedCompensationExpense $ 3,586us-gaap_AllocatedShareBasedCompensationExpense $ 4,454us-gaap_AllocatedShareBasedCompensationExpense  
Income tax benefit or expense for share-based award compensation (in dollars) 0us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense 0us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense 0us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense  
Cash received from exercised awards (in dollars) 22us-gaap_ProceedsFromStockOptionsExercised 595us-gaap_ProceedsFromStockOptionsExercised 538us-gaap_ProceedsFromStockOptionsExercised  
Tax deduction benefit for share-based compensation        
Actual tax deduction benefits from exercised stock options and vested restricted shares (in dollars) $ 1,965bont_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExercisedStockOptionsAndVestedRestrictedShares $ 2,456bont_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExercisedStockOptionsAndVestedRestrictedShares $ 2,115bont_EmployeeServiceShareBasedCompensationTaxBenefitRealizedFromExercisedStockOptionsAndVestedRestrictedShares  
Stock Options        
Share-based compensation        
Contractual term 7 years      
Granted (in shares) 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
 
Stock Options | Minimum        
Share-based compensation        
Vesting period 1 year      
Stock Options | Maximum        
Share-based compensation        
Vesting period 4 years      
Restricted Shares | Minimum        
Share-based compensation        
Vesting period 1 year      
Restricted Shares | Maximum        
Share-based compensation        
Vesting period 3 years      
Restricted Stock Units        
Share-based compensation        
Vesting period 1 year      
Omnibus Incentive Plan 2009        
Share-based compensation        
Shares authorized 4,500,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= bont_OmnibusIncentivePlan2009Member
     
Additional shares authorized 209,812us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
/ us-gaap_PlanNameAxis
= bont_OmnibusIncentivePlan2009Member
     
Shares available for grant 2,003,824us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= bont_OmnibusIncentivePlan2009Member
     
Stock Incentive and Performance Based Award Plan 2000        
Share-based compensation        
Shares authorized       3,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= bont_StockIncentiveAndPerformanceBasedAwardPlan2000Member
Shares available for grant 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
/ us-gaap_PlanNameAxis
= bont_StockIncentiveAndPerformanceBasedAwardPlan2000Member