Number of Held For Sale Properties Sold

No definition available.

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- Definition

Number of Properties Held For Sale

+ References

No definition available.

+ Details

Name:	bxc_NumberofPropertiesHeldForSale
Namespace Prefix:	bxc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of assets held-for-sale that are not part of a disposal group, expected to be sold within a year or the normal operating cycle, if longer.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 15
-Paragraph 4
-Subparagraph (b)(2)
-URI http://asc.fasb.org/extlink&oid=77912953&loc=d3e400-110220

+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Details

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Assets Held for Sale and Net Gain on Disposition (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019 USD ($) property	Sep. 29, 2018 USD ($)	Sep. 28, 2019 USD ($) property	Sep. 29, 2018 USD ($)	Dec. 29, 2018 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gains from sales of property \| $	$ 38	$ 0	$ 9,798	$ 0
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties held for sale \| property	4		4		6
Number of properties sold \| property			3
Net book value of assets held for sale \| $	$ 2,100		$ 2,100		$ 3,100