XML 89 R60.htm IDEA: XBRL DOCUMENT
v3.23.3

Investments, at Fair Value - Alternative Investments (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | --- | ---
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | $ 374,603 | $ 385,851 | $ 524,927
Unfunded Commitments | 60,157 | 61,135 | 69,093
Venture Capital |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 164,097 | 165,933 | 209,912
Unfunded Commitments | 2,877 | 2,810 | 3,035
Private Equity |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 143,714 | 145,073 | 199,280
Unfunded Commitments | 46,838 | 47,218 | 55,269
Natural Resources |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 27,832 | 27,756 | 31,736
Unfunded Commitments | 4,567 | 5,240 | 4,994
Hedge Funds |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 19,291 | 24,935 | 51,974
Unfunded Commitments | 337 | 337 | 358
Redeemable investments | 10,800 | 16,400 |
Private Real Estate |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 10,436 | 10,391 | 15,757
Unfunded Commitments | 4,808 | 4,800 | 4,802
Other |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |
Carrying Value | 9,233 | 11,763 | 16,268
Unfunded Commitments | $ 730 | $ 730 | $ 635

X
- Definition Fair Value, Alternative Investments, Entities that Calculate Net Asset Value Per Share, Redeemable + References No definition available. + Details
Name: | benf_FairValueAlternativeInvestmentsEntitiesThatCalculateNetAssetValuePerShareRedeemable
Namespace Prefix: | benf_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 35 -Paragraph 54B -Publisher FASB -URI https://asc.fasb.org//1943274/2147482134/820-10-35-54B Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
Name: | us-gaap_AlternativeInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Definition The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 6A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482106/820-10-50-6A + Details
Name: | us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_VentureCapitalFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_PrivateEquityFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=benf_NaturalResourcesFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_HedgeFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_RealEstateFundsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=us-gaap_OtherInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |