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Segment sales to external customers by product line (Details) (USD $)	3 Months Ended													12 Months Ended			3 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014 segment	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Segment Reporting [Abstract]
Number of Reportable Segments														3us-gaap_NumberOfReportableSegments
Sales to external customers [Line Items]
Revenue from External Customers	$ 862,000,000us-gaap_SalesRevenueNet	[1]	$ 983,300,000us-gaap_SalesRevenueNet	[1]	$ 961,200,000us-gaap_SalesRevenueNet	[1]	$ 767,200,000us-gaap_SalesRevenueNet	[1]	$ 798,300,000us-gaap_SalesRevenueNet	[1]	$ 878,000,000us-gaap_SalesRevenueNet	$ 852,300,000us-gaap_SalesRevenueNet	$ 744,900,000us-gaap_SalesRevenueNet	$ 3,573,732,000us-gaap_SalesRevenueNet	$ 3,273,496,000us-gaap_SalesRevenueNet	$ 2,779,062,000us-gaap_SalesRevenueNet
Foreign unaffiliated customers [Member]
Sales to external customers [Line Items]
Revenue from External Customers														76,200,000us-gaap_SalesRevenueNet / us-gaap_MajorCustomersAxis = bcc_ForeignunaffiliatedcustomersMember	87,200,000us-gaap_SalesRevenueNet / us-gaap_MajorCustomersAxis = bcc_ForeignunaffiliatedcustomersMember	82,000,000us-gaap_SalesRevenueNet / us-gaap_MajorCustomersAxis = bcc_ForeignunaffiliatedcustomersMember
Intersegment Eliminations [Member]
Sales to external customers [Line Items]
Revenue from External Customers														(529,900,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember	(460,200,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember	(354,400,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember
Wood Products and Building Materials Distribution [Member] | Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Sales to external customers [Line Items]
Concentration Risk Number of Customers															1bcc_ConcentrationRiskNumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember	1bcc_ConcentrationRiskNumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember
Concentration of credit risk															11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember		11.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember
Concentration risk, sales															350,900,000us-gaap_Revenues / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember	304,900,000us-gaap_Revenues / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember
Wood Products [Member]
Sales to external customers [Line Items]
Revenue from External Customers														787,200,000us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	674,000,000us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	589,300,000us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Intersegment Eliminations [Member]
Sales to external customers [Line Items]
Revenue from External Customers														(529,800,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	(460,100,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	(353,900,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Intersegment Eliminations [Member] | Building Materials Distribution [Member]
Sales to external customers [Line Items]
Intersegment sales as a percentage to total sales (as a percent)														40.00%bcc_IntersegmentSalesAsPercentagetoTotalSales / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_CounterpartyNameAxis = bcc_BuildingMaterialsDistributionMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Plywood and veneer [Member]
Sales to external customers [Line Items]
Revenue from External Customers														413,600,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_PlywoodAndVeneerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	367,800,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_PlywoodAndVeneerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	324,600,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_PlywoodAndVeneerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Engineered wood products [Member]
Sales to external customers [Line Items]
Revenue from External Customers														125,900,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	104,400,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	87,900,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Lumber [Member]
Sales to external customers [Line Items]
Revenue from External Customers														113,700,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_LumberMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	97,300,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_LumberMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	77,400,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_LumberMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Byproducts [Member]
Sales to external customers [Line Items]
Revenue from External Customers														56,100,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ByproductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	42,500,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ByproductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	44,600,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ByproductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Particleboard [Member]
Sales to external customers [Line Items]
Revenue from External Customers														52,300,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ParticleboardMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	40,200,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ParticleboardMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	33,100,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ParticleboardMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Wood Products [Member] | Other [Member]
Sales to external customers [Line Items]
Revenue from External Customers														25,700,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_OtherWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	21,700,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_OtherWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember	21,800,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_OtherWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember
Building Materials Distribution [Member]
Sales to external customers [Line Items]
Revenue from External Customers														2,786,500,000us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	2,599,500,000us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	2,189,800,000us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember
Building Materials Distribution [Member] | Intersegment Eliminations [Member]
Sales to external customers [Line Items]
Revenue from External Customers														(100,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	(100,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	(500,000)us-gaap_SalesRevenueNet / us-gaap_ConsolidationItemsAxis = us-gaap_IntersegmentEliminationMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember
Building Materials Distribution [Member] | Commodity [Member]
Sales to external customers [Line Items]
Revenue from External Customers														1,376,100,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_CommodityProductLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	1,333,200,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_CommodityProductLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	1,092,700,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_CommodityProductLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember
Building Materials Distribution [Member] | General line [Member]
Sales to external customers [Line Items]
Revenue from External Customers														937,300,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_GeneralLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	857,900,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_GeneralLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	794,900,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_GeneralLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember
Building Materials Distribution [Member] | Engineered wood products [Member]
Sales to external customers [Line Items]
Revenue from External Customers														$ 473,100,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	$ 408,400,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember	$ 302,200,000us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember
[1] Each quarter of 2014, as well as the three months ended December 31, 2013, includes the results of the acquired plywood plants, Chester Wood Products LLC and Moncure Plywood LLC.

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