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Fair Value Measurements (Detail Textuals) (USD $) In Millions, unless otherwise specified | Dec. 29, 2012
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Discounted carrying value |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Value of mortgage | $ 202.7
Fair value |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |
Value of mortgage | $ 202.2

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- Definition Mortgage loan fair value disclosure. + References No definition available. + Details
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Namespace Prefix: | bxc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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