XML 100 R74.htm IDEA: XBRL DOCUMENT
v3.20.4

Fair Value Measurements of Plan Assets (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets |  | $ 0 | $ 168,651 | $ 154,801
Receivables and Accrued Expenses, Net, Defined Benefit Plan Assets |  |  | $ (240) |
Equity Securities [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Period of Notice Required to Redeem Investments |  |  | 1 day |
Fixed Income Securities - Russell 14-Year LDI Fixed Income Fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Term of Fund |  |  | 14 years |
Fixed Income Securities - Russell 8-Year LDI Fixed Income Fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Term of Fund |  | 8 years |  |
Fixed Income Securities - Russell STRIPS Fixed Income Funds - Ten Years [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Term of Fund |  |  | 10 years |
Fixed Income Securities - Russell STRIPS Fixed Income Funds - Fifteen Years [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Term of Fund |  |  | 15 years |
Fixed Income Securities - Russell STRIPS Fixed Income Funds - Twenty-Eight Years [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Term of Fund |  |  | 28 years |
Multi-Asset Class Fund - Global Equity [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage |  |  | 75.00% |
Multi-Asset Class Fund - Marketable Real Assets [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage |  |  | 15.00% |
Multi-Asset Class Fund - Global Fixed Income [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage |  |  | 10.00% |
Fair Value, Inputs, Level 1, 2 and 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets |  |  | $ 168,891 |
Fair Value, Inputs, Level 1, 2 and 3 [Member] | Fixed Income Securities [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [1] |  | 152,530 |
Fair Value, Inputs, Level 1, 2 and 3 [Member] | Multi-Asset Class Fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [2] |  | 16,361 |
Level 1 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets |  |  | 0 |
Level 1 [Member] | Fixed Income Securities [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [1] |  | 0 |
Level 1 [Member] | Multi-Asset Class Fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [2] |  | 0 |
Level 2 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [3] |  | 168,891 |
Level 2 [Member] | Fixed Income Securities [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [1],[3] |  | 152,530 |
Level 2 [Member] | Multi-Asset Class Fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [2],[3] |  | 16,361 |
Level 3 [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets |  |  | 0 |
Level 3 [Member] | Fixed Income Securities [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [1] |  | 0 |
Level 3 [Member] | Multi-Asset Class Fund [Member] |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |
Defined benefit plan fair value of plan assets | [2] |  | $ 0 |
[1] | Invested in the Russell Long Duration Fixed Income Fund, which is designed to provide current income and capital appreciation through diversified strategies including sector rotation, modest interest rate timing, security selection, and tactical use of high-yield, emerging market bonds and other non-index securities. In addition, our investments in this category included the Russell 14 Year LDI Fixed Income Fund. We also were invested in the Russell 8 Year LDI Fixed Income Fund. These LDI funds invest primarily in investment grade bonds that closely match those found in discount rate curves used to value U.S. pension liabilities and seeks to provide additional incremental return through modest interest rate timing, security selection, and tactical use of non-credit sectors. In addition, our investments in this category included Russell STRIPS Fixed Income Funds with duration profiles of 10, 15, and 28 years. These funds invest in a subset of the STRIPS universe with a similar duration profile as their respective Bloomberg Barclays U.S. STRIPS Index.
[2] | Invested in the Russell Multi-Asset Core Plus Fund, which is designed to provide long-term growth by providing a diversified portfolio of investments that has an overall strategic allocation of 75% global equity, 15% marketable real assets, and 10% global fixed income.
[3] | Securities represent common collective trusts managed and valued by Russell Trust Company, the administrator of the funds. While the underlying assets are actively traded on an exchange, the funds are not. The investments in equity and fixed-income securities are considered to have a readily determinable fair value because the fair value per share (unit) is determined and published and is the basis for current transactions. We had the ability to redeem these securities with a 1 day notice.

X
- Definition Represents period of notice required to redeem investments in 'PnYnMnDTnHnMnS' format. + References No definition available. + Details
Name: | bcc_PeriodofNoticeRequiredtoRedeemInvestments
Namespace Prefix: | bcc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Receivables and accrued expenses, net related to defined benefit plan assets. + References No definition available. + Details
Name: | bcc_ReceivablesAndAccruedExpensesNetDefinedBenefitPlanAssets
Namespace Prefix: | bcc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The term of the fund in years + References No definition available. + Details
Name: | bcc_TermofFund
Namespace Prefix: | bcc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanFairValueOfPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of investment to total investment within defined benefit plan asset category. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=118257860&loc=d3e4179-114921 + Details
Name: | us-gaap_DefinedBenefitPlanPlanAssetsInvestmentWithinPlanAssetCategoryPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_FixedIncomeSecuritiesRussell14YearLDIFixedIncomeFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_FixedIncomeSecuritiesRussell8YearLDIFixedIncomeFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_FixedIncomeSecuritiesRussellSTRIPSFixedIncomeFundsTenYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_FixedIncomeSecuritiesRussellSTRIPSFixedIncomeFundsFifteenYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_FixedIncomeSecuritiesRussellSTRIPSFixedIncomeFundsTwentyEightYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_MultiAssetClassFundGlobalEquityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_MultiAssetClassFundMarketableRealAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_MultiAssetClassFundGlobalFixedIncomeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel12And3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=us-gaap_FixedIncomeSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis=bcc_MultiAssetClassFundMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |