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Use of Special Purpose Entities (SPE) and Variable Interest Entities (VIE) - Narrative (Details) | 3 Months Ended | 6 Months Ended |
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Jun. 30, 2025 USD ($) securitization | Jun. 30, 2024 USD ($) jointVenture | Jun. 30, 2025 USD ($) securitization | Jun. 30, 2024 USD ($) jointVenture | Dec. 31, 2024 USD ($) securitization
Variable Interest Entity [Line Items] |  |  |  |  |
Number of securitizations completed | securitization |  |  | 2 |  |
Proceeds from securitizations of loans held-for-investment |  |  | $ 326,300,000 |  |
Gain (loss) on extinguishment of debt | $ 0 | $ 0 | $ 0 | $ (692,000) |
VIE, Primary Beneficiary | Multifamily |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Number of equity investments sold | jointVenture |  | 1 |  | 2 |
VIE, Primary Beneficiary | Consolidated SLST |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Number of securitization trusts | securitization | 3 |  | 3 |  | 2
VIE, Primary Beneficiary | Consolidated SLST | Level 3 |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Variable interest entity, primary beneficiary, maximum loss exposure, amount | $ 160,900,000 |  | $ 160,900,000 |  | $ 148,500,000
Residential loans held in securitization trusts |  |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |  |
Number of securitizations optional redemption right exercised | securitization |  |  | 1 |  |
Proceeds from residential loan securitization redemption (approximately) |  |  | $ 54,400,000 |  |
Gain (loss) on extinguishment of debt |  |  | $ 0 |  |

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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481303/470-50-40-4 + Details
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- Definition The cash inflow from the securitization of loans held for investment. Securitization is the structured process whereby interests in loans and other receivables are packaged, underwritten, and sold in the form of asset-backed securities. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 12 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-12 + Details
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