XML 67 R37.htm IDEA: XBRL DOCUMENT v3.19.3

Revenue Recognition (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2019 USD ($) day	Sep. 29, 2018 USD ($)	Sep. 28, 2019 USD ($) day	Sep. 29, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Standard terms of payment, number of days | day	10		10
Net sales	$ 678,665	$ 859,776	$ 2,023,814	$ 2,190,215
Warehouse and reload
Disaggregation of Revenue [Line Items]
Net sales	577,172	716,604	1,693,206	1,815,531
Direct
Disaggregation of Revenue [Line Items]
Net sales	114,586	153,847	360,252	402,420
Service revenue
Disaggregation of Revenue [Line Items]
Net sales	272	981	1,033	2,872
Customer discounts and rebates
Disaggregation of Revenue [Line Items]
Net sales	(13,365)	(11,656)	(30,677)	(30,608)
Structural products
Disaggregation of Revenue [Line Items]
Net sales	225,522	312,510	646,513	833,412
Specialty products
Disaggregation of Revenue [Line Items]
Net sales	$ 453,143	$ 547,266	$ 1,377,301	$ 1,356,803

X

- Definition

Contract With Customer, Standard Terms Of Payment, Number Of Days

+ References

No definition available.

+ Details

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

X

- 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

Name:	us-gaap_DisaggregationOfRevenueLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

+ Details

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_ContractWithCustomerSalesChannelAxis=bxc_SalesChannelWarehouseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerSalesChannelAxis=bxc_SalesChannelDirectMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerSalesChannelAxis=bxc_SalesChannelReloadandServiceRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ContractWithCustomerSalesChannelAxis=bxc_AdjustmentForSalesDiscountsReturnsAndAllowancesGoodsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=bxc_StructuralProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_ProductOrServiceAxis=bxc_SpecialtyProductsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: