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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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 3 us-gaap_NumberOfReportableSegments |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers | $ 862,000,000 us-gaap_SalesRevenueNet | [1] | $ 983,300,000 us-gaap_SalesRevenueNet | [1] | $ 961,200,000 us-gaap_SalesRevenueNet | [1] | $ 767,200,000 us-gaap_SalesRevenueNet | [1] | $ 798,300,000 us-gaap_SalesRevenueNet | [1] | $ 878,000,000 us-gaap_SalesRevenueNet | $ 852,300,000 us-gaap_SalesRevenueNet | $ 744,900,000 us-gaap_SalesRevenueNet | $ 3,573,732,000 us-gaap_SalesRevenueNet | $ 3,273,496,000 us-gaap_SalesRevenueNet | $ 2,779,062,000 us-gaap_SalesRevenueNet |
Foreign unaffiliated customers [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sales to external customers [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customers |  |  |  |  |  |  |  |  |  |  |  |  |  | 76,200,000 us-gaap_SalesRevenueNet / us-gaap_MajorCustomersAxis = bcc_ForeignunaffiliatedcustomersMember | 87,200,000 us-gaap_SalesRevenueNet / us-gaap_MajorCustomersAxis = bcc_ForeignunaffiliatedcustomersMember | 82,000,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1 bcc_ConcentrationRiskNumberofCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember | 1 bcc_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 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 350,900,000 us-gaap_Revenues / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = bcc_OneCustomerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsandBuildingMaterialsDistributionMember | 304,900,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 787,200,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 674,000,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 589,300,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 413,600,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_PlywoodAndVeneerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 367,800,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_PlywoodAndVeneerMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 324,600,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 125,900,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 104,400,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 87,900,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 113,700,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_LumberMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 97,300,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_LumberMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 77,400,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 56,100,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ByproductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 42,500,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ByproductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 44,600,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,300,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ParticleboardMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 40,200,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_ParticleboardMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 33,100,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,700,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_OtherWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 21,700,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_OtherWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_WoodProductsMember | 21,800,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,786,500,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | 2,599,500,000 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | 2,189,800,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,376,100,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_CommodityProductLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | 1,333,200,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_CommodityProductLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | 1,092,700,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | 937,300,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_GeneralLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | 857,900,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_GeneralLineMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | 794,900,000 us-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 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 473,100,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | $ 408,400,000 us-gaap_SalesRevenueNet / us-gaap_ProductOrServiceAxis = bcc_EngineeredWoodProductsMember / us-gaap_StatementBusinessSegmentsAxis = bcc_BuildingMaterialsDistributionMember | $ 302,200,000 us-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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