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INTANGIBLE ASSETS (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Jan. 31, 2015
Feb. 01, 2014
Asset
Feb. 02, 2013
Intangible assets subject to amortization      
Total gross amount $ 104,105us-gaap_FiniteLivedIntangibleAssetsGross $ 114,271us-gaap_FiniteLivedIntangibleAssetsGross  
Total accumulated amortization (64,451)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization (62,068)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization  
Net intangible assets subject to amortization 39,654us-gaap_FiniteLivedIntangibleAssetsNet 52,203us-gaap_FiniteLivedIntangibleAssetsNet  
Intangible assets not subject to amortization      
Total intangible assets not subject to amortization 50,497us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill 50,597us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill  
Intangible Assets, Net (Excluding Goodwill), Total 90,151us-gaap_IntangibleAssetsNetExcludingGoodwill 102,800us-gaap_IntangibleAssetsNetExcludingGoodwill  
Trade names      
Intangible assets not subject to amortization      
Total intangible assets not subject to amortization 40,200us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
40,300us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
 
Impairment disclosures      
Impairment charges related to intangible asset not subject to amortization 100us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
   
Number of indefinite-lived intangible assets impaired 1bont_NumberOfIndefiniteLivedIntangibleAssetsImpairmentCharges
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
   
Private label brand names      
Intangible assets not subject to amortization      
Total intangible assets not subject to amortization 10,297us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= bont_PrivateLabelBrandNamesMember
10,297us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= bont_PrivateLabelBrandNamesMember
 
Impairment disclosures      
Impairment charges related to intangible asset not subject to amortization   54us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= bont_PrivateLabelBrandNamesMember
750us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= bont_PrivateLabelBrandNamesMember
Number of indefinite-lived intangible assets impaired   1bont_NumberOfIndefiniteLivedIntangibleAssetsImpairmentCharges
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= bont_PrivateLabelBrandNamesMember
3bont_NumberOfIndefiniteLivedIntangibleAssetsImpairmentCharges
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= bont_PrivateLabelBrandNamesMember
Lease related interests      
Intangible assets subject to amortization      
Total gross amount 81,179us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
91,345us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
 
Total accumulated amortization (46,309)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
(45,555)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
 
Amortization      
Amortization expenses 4,542us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
4,543us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
4,696us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
Anticipated amortization expenses      
2015 4,245us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
   
2016 4,030us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
   
2017 3,941us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
   
2018 3,630us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
   
2019 3,240us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
   
Impairment disclosures      
Impairment charges related to definite-lived intangible assets   214us-gaap_ImpairmentOfIntangibleAssetsFinitelived
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
 
Number of definite-lived intangible assets impaired   1bont_NumberOfDefiniteLivedIntangibleAssetsImpairmentCharges
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_LeaseRelatedInterestsMember
 
Lease related interests | Weighted-average      
Amortization      
Remaining lives for amortization purposes 9 years    
Customer lists and relationships      
Intangible assets subject to amortization      
Total gross amount 22,926us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
22,926us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
 
Total accumulated amortization (18,142)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
(16,513)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
 
Amortization      
Remaining lives for amortization purposes 4 years    
Amortization expenses 1,629us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
1,759us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
1,890us-gaap_AmortizationOfIntangibleAssets
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
Anticipated amortization expenses      
2015 1,500us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
   
2016 1,370us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
   
2017 1,262us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember
   
2018 $ 652us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= bont_CustomerListsAndRelationshipsMember