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PER-SHARE AMOUNTS (Details 2)
3 Months Ended
May 02, 2015
May 03, 2014
Restricted Shares    
Antidilutive securities    
Antidilutive securities excluded from calculation of earnings per share (in shares) 708,961us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember
729,534us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_RestrictedStockMember
Stock Options    
Antidilutive securities    
Antidilutive securities excluded from calculation of earnings per share (in shares) 110,196us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
256,008us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Securities that would have increased the weighted average common shares outstanding if the entity had reported income during the period (in shares) 16,790bont_SecuritiesWeightedAverageCommonSharesOutstandingEffectIfEntityReportedIncome
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
103,150bont_SecuritiesWeightedAverageCommonSharesOutstandingEffectIfEntityReportedIncome
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember