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Agreements and Transactions with Related Parties - 2017 Activity (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Mar. 31, 2025 | Dec. 31, 2017
Agreements and Transactions with Related Parties |  |  |
Servicing revenue | $ 44,033 | $ 43,361 |
Multifamily | Fannie Mae Mortgage | Other Related Party Transactions | Related Party |  |  |
Agreements and Transactions with Related Parties |  |  |
Principal amount |  |  | $ 46,900
Percentage of ownership interest of related party in the entity |  |  | 17.60%
Percentage of maximum loss-sharing obligation unpaid principal balance |  |  | 5.00%
Servicing revenue |  | $ 100 |

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- Definition Amount of contractual principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 29 -Paragraph Column F -Publisher SEC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section S50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478322/948-310-S50-2 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Column F)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479628/948-310-S99-1 + Details
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- Definition All amounts that, per contract, are due to the servicer in exchange for servicing the financial asset and would no longer be received by a servicer if the beneficial owners of the serviced assets (or their trustees or agents) were to exercise their actual or potential authority under the contract to shift the servicing to another servicer. Depending on the servicing contract, those fees may include some or all of the difference between the interest rate collected on the asset being serviced and the rate to be paid to the beneficial owners of the asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 50 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481229/860-50-50-2 + Details
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