Accrued customer rebates and allowances as of the balance sheet date.

No definition available.

Name:	bcc_CustomerRebatesAndAllowances
Namespace Prefix:	bcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the number of primary distribution methods of selling products.

+ References

No definition available.

+ Details

Name:	bcc_NumberofPrimaryDistributionMethods
Namespace Prefix:	bcc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=bcc_BuildingMaterialsDistributionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=us-gaap_ShippingAndHandlingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Revenues Revenue Recognition (Details) $ in Millions	12 Months Ended
Revenues Revenue Recognition (Details) $ in Millions	Dec. 31, 2020 USD ($) Distribution	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Revenue from External Customer [Line Items]
Customer Rebates and Allowances	$ 56.3	$ 49.4
Building Materials Distribution [Member]
Revenue from External Customer [Line Items]
Number of Primary Distribution Methods \| Distribution	2
Building Materials Distribution [Member] \| Shipping and Handling [Member]
Revenue from External Customer [Line Items]
Cost of Goods and Services Sold	$ 177.1	$ 169.2	$ 156.5