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Loans and Investments - Prior Years Loan Resolutions (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 30, 2024 USD ($) | Apr. 30, 2023 USD ($) loan | Dec. 31, 2024 USD ($) loan | Dec. 31, 2023 USD ($) loan | Dec. 31, 2024 USD ($) loan | Dec. 31, 2023 USD ($) loan | Dec. 31, 2022 USD ($) loan
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Recoveries of reserves |  |  |  |  | $ 12,959 | $ 4,776 | $ 1,500
Number of loans sold | loan |  | 4 |  |  |  |  |
Bridge loans, total UPB |  |  |  |  | $ 611,696 | $ 427,929 |
Financing Receivable, Accrued Interest, After Allowance For Credit Loss, Statement Of Financial Position, Extensible List Not Disclosed |  |  |  |  | deferred interest | deferred interest |
Gain on sales, including fee-based services, net |  |  |  |  | $ 74,932 | $ 72,522 | $ 55,816
Interest reserve |  |  |  |  | $ 215,400 | $ 156,100 |
Number of loans covered under interest reserve | loan |  |  | 589 | 537 | 589 | 537 |
Interest reserve, unpaid principal balance |  |  | $ 8,650,000 | $ 8,440,000 | $ 8,650,000 | $ 8,440,000 |
Bridge Loans |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Bridge loans, total UPB | $ 100,300 |  |  | 100,300 |  |  |
Houston Properties |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Proceeds from sale of real estate | $ 101,300 | $ 239,400 |  |  |  |  |
Houston Properties | Bridge Loans |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Recoveries of reserves |  |  | 7,700 |  |  |  |
Bridge loans, total UPB |  |  | 73,300 |  |  |  |
Financing receivable, deferred basis spread on variable rate |  | 3.47% |  |  |  |  |
Financing receivable, accrued interest |  |  | $ 22,200 | 10,300 | $ 22,200 | 10,300 |
Minimum | Houston Properties | Bridge Loans |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Financing receivable, fixed interest rate |  | 0.0300 |  |  |  |  |
Maximum | Houston Properties | Bridge Loans |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Financing receivable, fixed interest rate |  | 0.0500 |  |  |  |  |
Office |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Financing receivable, net of reserve |  |  |  | 37,100 |  | 37,100 |
Loan reserve |  |  |  | 8,000 |  | $ 8,000 |
Recoveries of reserves |  |  |  | $ 2,300 |  |  |
Bridge Loans |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Number of loans sold | loan |  |  |  |  |  |  | 4
Bridge loans, total UPB |  | $ 217,400 |  |  |  |  |
Unpaid principal balance on loans |  |  |  |  |  |  | $ 296,900
Gain on sales, including fee-based services, net |  |  |  |  |  |  | 2,000
Financing receivable |  |  |  |  |  |  | 78,000
Bridge Loan and Mezzanine Loan |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |
Total mortgage loans and mezzanine loan sold |  |  |  |  |  |  | 110,500
Loan discount |  |  |  |  |  |  | 102,200
Capital investment to be used for future |  |  |  |  |  |  | 66,300
Fees and expenses |  |  |  |  |  |  | 9,200
Additional potential loan recover |  |  |  |  |  |  | $ 2,800

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