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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3)
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Feb. 02, 2013
Restricted Stock and Restricted Stock Units      
Antidilutive securities      
Antidilutive securities excluded from calculation of earnings per share (in shares) 702,188us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= bont_RestrictedStockAndRestrictedStockUnitsMember
914,941us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= bont_RestrictedStockAndRestrictedStockUnitsMember
1,314,491us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= bont_RestrictedStockAndRestrictedStockUnitsMember
Stock Options      
Antidilutive securities      
Antidilutive securities excluded from calculation of earnings per share (in shares) 212,750us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
363,298us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
841,224us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
Securities that would have a dilutive effect if the entity reported income (in shares) 86,872bont_SecuritiesThatWouldHaveDilutiveEffectIfEntityReportedIncome
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
142,068bont_SecuritiesThatWouldHaveDilutiveEffectIfEntityReportedIncome
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember
128,452bont_SecuritiesThatWouldHaveDilutiveEffectIfEntityReportedIncome
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_EmployeeStockOptionMember