XML 110 R93.htm IDEA: XBRL DOCUMENT
v3.25.4

Loan Securitization/Sale Activities - Narrative (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Commercial and Residential Lending Segment |  |  |  |
Loan Transfer Activities |  |  |  |
Net gains (losses) on the sale of loan qualifying for sales treatment |  | $ (400,000) | $ 300,000 | $ 0
Commercial and Residential Lending Segment | First Mortgage Loan |  |  |  |
Loan Transfer Activities |  |  |  |
Loans held-for-sale face amount |  | 231,700,000 |  |
Proceeds |  | 229,900,000 |  |
Commercial and Residential Lending Segment | First Mortgage and Mezzanine Loan |  |  |  |
Loan Transfer Activities |  |  |  |
Loans held-for-sale face amount |  |  | 40,100,000 |
Commercial and Residential Lending Segment | Mezzanine Loans |  |  |  |
Loan Transfer Activities |  |  |  |
Loans held-for-sale face amount |  |  |  | 95,500,000
Investing and Servicing Loan Sales |  |  |  |
Loan Transfer Activities |  |  |  |
Loans held-for-sale face amount |  | 42,500,000 | 127,900,000 |
Proceeds |  | 43,500,000 | 124,800,000 |
Investing and Servicing Loan Sales | Residential Loans |  |  |  |
Loan Transfer Activities |  |  |  |
Loans held-for-sale face amount |  | 0 | 0 | 0
Infrastructure Lending Segment |  |  |  |
Loan Transfer Activities |  |  |  |
Loans held-for-sale face amount |  | 0 | 49,500,000 | 0
Proceeds |  |  | 47,100,000 |
Loans held for sale Sold fair value adjustment | $ 1,500,000 |  |  |
RMBS |  |  |  |
Loan Transfer Activities |  |  |  |
Payments to acquire marketable securities |  | $ 0 | $ 0 | $ 0

X
- Definition Net gain or loss resulting from the difference between the sale price and the carrying value when a financial asset transferred in a securitization, asset-backed financing arrangement, or similar transfer is accounted for as a sale, including those transactions in which the seller or transferor has continuing involvement with the financial assets that have been transferred. + References No definition available. + Details
Name: | stwd_AmountOfNetGainOrLossFromSaleOfFinancialAssetsInSecuritizations
Namespace Prefix: | stwd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | stwd_LoanTransferActivitiesLineItems
Namespace Prefix: | stwd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the fair value of loans held-for-sale, sold during the period. + References No definition available. + Details
Name: | stwd_LoansHeldForSaleSoldFairValue
Namespace Prefix: | stwd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loans Held for Sale, Sold Fair Value Adjustment + References No definition available. + Details
Name: | stwd_LoansHeldForSaleSoldFairValueAdjustment
Namespace Prefix: | stwd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the par value of loans held-for-sale, sold during the period. + References No definition available. + Details
Name: | stwd_LoansHeldForSaleSoldParValue
Namespace Prefix: | stwd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash outflow for purchase of marketable security. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481830/320-10-45-11 + Details
Name: | us-gaap_PaymentsToAcquireMarketableSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stwd_CommercialAndResidentialLendingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=us-gaap_FirstMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=stwd_FirstMortgageAndMezzanineLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=stwd_MezzanineLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stwd_InvestingAndServicingLoanSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=stwd_LoansHeldForSaleResidentialMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=stwd_InfrastructureLendingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |