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v2.4.1.9

Supplemental Condensed Consolidating Financial Statements (Details 3) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
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Jan. 03, 2015 | Oct. 04, 2014 | Jul. 05, 2014 | Apr. 05, 2014 | Jan. 04, 2014 | Sep. 28, 2013 | Jun. 29, 2013 | Mar. 30, 2013 | Jan. 03, 2015 | Jan. 04, 2014 | Dec. 29, 2012
Supplemental Statement Of Stockholders' Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | $ (5,898)us-gaap_StockholdersEquity |  |  |  | $ (20,592)us-gaap_StockholdersEquity | $ (5,898)us-gaap_StockholdersEquity | $ (20,592)us-gaap_StockholdersEquity | $ 8,374 us-gaap_StockholdersEquity
Net (loss) income | (7,640)us-gaap_NetIncomeLoss | (860)us-gaap_NetIncomeLoss | 3,236 us-gaap_NetIncomeLoss | (8,608)us-gaap_NetIncomeLoss | (2,457)us-gaap_NetIncomeLoss | (3,206)us-gaap_NetIncomeLoss | (22,306)us-gaap_NetIncomeLoss | (12,649)us-gaap_NetIncomeLoss | (13,872)us-gaap_NetIncomeLoss | (40,618)us-gaap_NetIncomeLoss | (23,027)us-gaap_NetIncomeLoss
Foreign currency translation adjustment, net of tax |  |  |  |  |  |  |  |  | (481)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | (161)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax | 103 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Unrealized (loss) income from pension plan, net of taxes |  |  |  |  |  |  |  |  | (17,651)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax | 13,910 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax | (8,245)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax
Issuance of restricted stock, net of forfeitures |  |  |  |  |  |  |  |  | 18 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 6 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures | 19 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures
Issuance of performance shares |  |  |  |  |  |  |  |  | 10 bxc_StockIssuedDuringPeriodValueSharePerformance | 6 bxc_StockIssuedDuringPeriodValueSharePerformance |
Issuance of stock related to the rights offerings, net of expenses |  |  |  |  |  |  |  |  | 0 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings | 38,613 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings |
Compensation related to share-based grants |  |  |  |  |  |  |  |  | 2,896 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 6,117 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue | 2,730 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Impact of net settled shares for vested grants |  |  |  |  |  |  |  |  | (963)bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants | (3,193)bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants | (526)bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants
Excess tax benefits from share-based compensation arrangements |  |  |  |  |  |  |  |  | (16)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation | 16 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation |
Other |  |  |  |  |  |  |  |  | (69)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther | (2)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther | (20)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther
Net transactions with Parent |  |  |  |  |  |  |  |  | 0 bxc_NetTransactionsWithParent | 0 bxc_NetTransactionsWithParent | 0 bxc_NetTransactionsWithParent
Balance | (36,026)us-gaap_StockholdersEquity |  |  |  | (5,898)us-gaap_StockholdersEquity |  |  |  | (36,026)us-gaap_StockholdersEquity | (5,898)us-gaap_StockholdersEquity | (20,592)us-gaap_StockholdersEquity
BlueLinx Holdings Inc. |  |  |  |  |  |  |  |  |  |  |
Supplemental Statement Of Stockholders' Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | (5,898)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |  | (20,592)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (5,898)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (20,592)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 8,374 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net (loss) income |  |  |  |  |  |  |  |  | (13,872)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (40,618)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (23,027)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Foreign currency translation adjustment, net of tax |  |  |  |  |  |  |  |  | (481)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (161)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 103 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Unrealized (loss) income from pension plan, net of taxes |  |  |  |  |  |  |  |  | (17,651)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 13,910 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (8,245)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Issuance of restricted stock, net of forfeitures |  |  |  |  |  |  |  |  | 18 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 6 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 19 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Issuance of performance shares |  |  |  |  |  |  |  |  | 10 bxc_StockIssuedDuringPeriodValueSharePerformance / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 6 bxc_StockIssuedDuringPeriodValueSharePerformance / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Issuance of stock related to the rights offerings, net of expenses |  |  |  |  |  |  |  |  | 0 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 38,613 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Compensation related to share-based grants |  |  |  |  |  |  |  |  | 2,896 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 6,117 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 2,730 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Impact of net settled shares for vested grants |  |  |  |  |  |  |  |  | (963)bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (3,193)bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (526)bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Excess tax benefits from share-based compensation arrangements |  |  |  |  |  |  |  |  | (16)us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 16 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |
Other |  |  |  |  |  |  |  |  | (69)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (2)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (20)us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Net transactions with Parent |  |  |  |  |  |  |  |  | 0 bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | 0 bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
Balance | (36,026)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |  | (5,898)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember |  |  |  | (36,026)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (5,898)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember | (20,592)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ParentCompanyMember
BlueLinx Corporation and Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Supplemental Statement Of Stockholders' Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | 49,039 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |  |  | 40,603 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 49,039 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 40,603 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 83,626 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net (loss) income |  |  |  |  |  |  |  |  | (23,534)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (49,205)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (37,237)us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Foreign currency translation adjustment, net of tax |  |  |  |  |  |  |  |  | (481)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (161)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 103 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Unrealized (loss) income from pension plan, net of taxes |  |  |  |  |  |  |  |  | (17,651)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 13,910 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | (8,245)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Issuance of restricted stock, net of forfeitures |  |  |  |  |  |  |  |  | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 6 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 19 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Issuance of performance shares |  |  |  |  |  |  |  |  | 0 bxc_StockIssuedDuringPeriodValueSharePerformance / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 6 bxc_StockIssuedDuringPeriodValueSharePerformance / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Issuance of stock related to the rights offerings, net of expenses |  |  |  |  |  |  |  |  | 0 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Compensation related to share-based grants |  |  |  |  |  |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Impact of net settled shares for vested grants |  |  |  |  |  |  |  |  | 0 bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Excess tax benefits from share-based compensation arrangements |  |  |  |  |  |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |
Other |  |  |  |  |  |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Net transactions with Parent |  |  |  |  |  |  |  |  | 1,301 bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 43,880 bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 2,337 bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
Balance | 8,674 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |  |  | 49,039 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember |  |  |  | 8,674 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 49,039 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember | 40,603 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_GuarantorSubsidiariesMember
LLC Subsidiaries |  |  |  |  |  |  |  |  |  |  |
Supplemental Statement Of Stockholders' Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | (96,774)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |  | (107,656)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (96,774)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (107,656)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (124,175)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net (loss) income |  |  |  |  |  |  |  |  | 15,000 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 14,343 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 18,536 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Foreign currency translation adjustment, net of tax |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Unrealized (loss) income from pension plan, net of taxes |  |  |  |  |  |  |  |  | 0 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Issuance of restricted stock, net of forfeitures |  |  |  |  |  |  |  |  | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Issuance of performance shares |  |  |  |  |  |  |  |  | 0 bxc_StockIssuedDuringPeriodValueSharePerformance / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 bxc_StockIssuedDuringPeriodValueSharePerformance / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Issuance of stock related to the rights offerings, net of expenses |  |  |  |  |  |  |  |  | 0 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 bxc_StockIssuedDuringPeriodValueNewIssuesPursuantToRightOfferings / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Compensation related to share-based grants |  |  |  |  |  |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Impact of net settled shares for vested grants |  |  |  |  |  |  |  |  | 0 bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 bxc_AdjustmentToAdditionalPaidInCapitalImpactOfNetSettledSharesForVestedGrants / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Excess tax benefits from share-based compensation arrangements |  |  |  |  |  |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |
Other |  |  |  |  |  |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalOther / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Net transactions with Parent |  |  |  |  |  |  |  |  | (5,164)bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (3,461)bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (2,017)bxc_NetTransactionsWithParent / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Balance | (86,938)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |  | (96,774)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember |  |  |  | (86,938)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (96,774)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember | (107,656)us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_NonGuarantorSubsidiariesMember
Eliminations |  |  |  |  |  |  |  |  |  |  |
Supplemental Statement Of Stockholders' Equity [Abstract] |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  | 47,735 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember |  |  |  | 67,053 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 47,735 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 67,053 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 40,549 us-gaap_StockholdersEquity / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Net (loss) income |  |  |  |  |  |  |  |  | 8,534 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 34,862 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 18,701 us-gaap_NetIncomeLoss / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Foreign currency translation adjustment, net of tax |  |  |  |  |  |  |  |  | 481 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 161 us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (103)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Unrealized (loss) income from pension plan, net of taxes |  |  |  |  |  |  |  |  | 17,651 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (13,910)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | 8,245 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
Issuance of restricted stock, net of forfeitures |  |  |  |  |  |  |  |  | 0 us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (6)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember | (19)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / dei_LegalEntityAxis = us-gaap_ConsolidationEliminationsMember
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