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v2.4.1.9

Mortgage (Detail Textuals) (Mortgage) | 12 Months Ended
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Jan. 03, 2015 Facility
Mortgage |
Debt Instrument [Line Items] |
Mortgage loan term | 10 years
Distribution facilities | 49 bxc_MortgageLoanSecuredByNumberOfDistributionFacilities / us-gaap_LongtermDebtTypeAxis = us-gaap_FirstMortgageMember
Mortgage interest rate | 6.35%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_LongtermDebtTypeAxis = us-gaap_FirstMortgageMember

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- Definition Represents mortgage loan secured by number of distribution facilities + References No definition available. + Details
Name: | bxc_MortgageLoanSecuredByNumberOfDistributionFacilities
Namespace Prefix: | bxc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents mortgage loan term period. + References No definition available. + Details
Name: | bxc_MortgageLoanTerm
Namespace Prefix: | bxc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DebtInstrumentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration