XML 51 R40.htm IDEA: XBRL DOCUMENT
v3.26.1

Summary of Significant Accounting Policies - Schedule of Variable Interest Entities (Details) $ in Millions | Mar. 31, 2026 USD ($) variableInterestEntity | Jun. 30, 2025 loan
--- | --- | ---
Variable Interest Entity [Line Items] |  |
Number of unconsolidated VIEs | variableInterestEntity | 10 |
Preferred Equity Investments 6 pack |  |
Variable Interest Entity [Line Items] |  |
Return on investment rates | 14.00% |
Maximum exposure to loss | $ 171.3 |
Carrying Value | 10.8 |
Commitment | 14.1 |
Number of senior loans | loan |  | 6
Number of investments | loan |  | 6
Preferred Equity Investments 7-10 |  |
Variable Interest Entity [Line Items] |  |
Maximum exposure to loss | 111.4 |
Carrying Value | 3.4 |
Commitment | $ 7.4 |
Preferred Equity Investments 7-10 | Minimum |  |
Variable Interest Entity [Line Items] |  |
Return on investment rates | 15.00% |
Preferred Equity Investments 7-10 | Maximum |  |
Variable Interest Entity [Line Items] |  |
Return on investment rates | 20.00% |

X
- Definition Investments, Fixed Return Rate + References No definition available. + Details
Name: | brsp_InvestmentsFixedReturnRate
Namespace Prefix: | brsp_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Preferred Equity Investments + References No definition available. + Details
Name: | brsp_NumberOfPreferredEquityInvestments
Namespace Prefix: | brsp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Senior Loans + References No definition available. + Details
Name: | brsp_NumberOfSeniorLoans
Namespace Prefix: | brsp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of Unconsolidated VIEs + References No definition available. + Details
Name: | brsp_NumberOfUnconsolidatedVIEs
Namespace Prefix: | brsp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Variable Interest Entity, Reporting Entity Involvement, Carrying Amount + References No definition available. + Details
Name: | brsp_VariableInterestEntityReportingEntityInvolvementCarryingAmount
Namespace Prefix: | brsp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Variable Interest Entity, Reporting Entity Involvement, Commitment, Amount + References No definition available. + Details
Name: | brsp_VariableInterestEntityReportingEntityInvolvementCommitmentAmount
Namespace Prefix: | brsp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-6 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-4 + Details
Name: | us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-25 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (bb) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481203/810-10-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 810 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481231/810-10-45-25 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(1)(ii) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A + Details
Name: | us-gaap_VariableInterestEntityLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |