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Schedule IV - Mortgage Loans on Real Estate - Summary of Changes in Carrying Amounts of Mortgage Loans (Parenthetical) (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 12 Months Ended
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Apr. 30, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and leases receivable, gain (loss) on sales, net | [1] |  |  |  |  |  | $ (128,191) |  | $ (86,604) | $ (24,894)
Realized loss on investments |  |  |  |  |  |  | 700 |  |  |
Write-offs, specific CECL allowance, funded |  |  |  |  |  |  | 127,512 |  | 81,890 |
Realized loss on investments |  |  |  |  |  |  |  |  |  | 17,900
Specific CECL allowance increased |  |  |  |  |  |  |  |  | 59,500 |
Carrying value, net |  |  |  |  |  |  | 7,104,156 | [2] | 8,358,093 |
Increase in Specific CECL Allowance, net |  |  |  |  |  |  |  |  |  | (11,500)
Allowance for credit loss, current |  |  |  |  | $ 7,000 |  |  |  |  | 7,000
General allowance for credit loss liability on unfunded |  |  |  |  | 4,300 |  | 5,900 |  | 4,000 | 4,300
Interest received for loans in cost recovery |  |  |  |  |  |  | 9,100 |  | 2,500 | 3,200
Mezzanine Loans |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Carrying value, net |  |  |  |  |  |  | 721,700 |  | 674,500 |
Commercial Mortgage and Subordinated Portfolio Segment |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and leases receivable, gain (loss) on sales, net |  |  |  |  |  |  |  |  | 200 |
Write-offs, specific CECL allowance, funded |  |  |  |  |  |  | 127,512 |  | 81,980 | 24,900
Specific CECL allowance increased |  |  |  |  |  |  | 149,500 |  |  |
Carrying value, net |  |  |  |  |  |  | $ 8,300 |  | 95,500 |
Hotel - Honolulu, HI |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and leases receivable, gain (loss) on sales, net |  | $ (700) |  |  |  |  |  |  |  |
Loan, mortgage, held-for-sale, price percentage |  |  | 99.50% |  |  |  | 99.50% |  |  |
Massachusetts Healthcare Loan |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and leases receivable, gain (loss) on sales, net |  |  |  |  |  |  | $ (127,500) |  |  |
Hotel - Atlanta, GA |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Loans and leases receivable, gain (loss) on sales, net |  |  |  |  |  |  |  |  | (4,800) |
Urban Predevelopment Miami F L [Member] |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Write-offs, specific CECL allowance, funded |  |  |  |  |  |  |  |  |  | 15,000
Specific CECL allowance (reversal), net of previously recorded amount |  |  |  |  |  |  |  |  |  | 53,000
Residential - Manhattan, NY |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Write-offs, specific CECL allowance, funded |  |  |  |  | $ 7,000 | $ 7,000 |  |  |  |
Increase in Specific CECL Allowance, net |  |  |  |  |  |  |  |  |  | 66,500
Ultra Luxury Residential Property Manhattan, NY | Commercial Mortgage and Subordinated Portfolio Segment |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Write-offs, specific CECL allowance, funded |  |  |  | $ 82,000 |  |  |  |  |  |
Specific CECL allowance increased |  |  |  |  |  |  |  |  | $ 141,500 |
Multifamily Development - Brooklyn, NY |  |  |  |  |  |  |  |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |  |  |  |  |  |  |  |
Specific CECL allowance (reversal), net of previously recorded amount |  |  |  |  |  |  |  |  |  | $ (10,000)
[1] | During the year ended December 31, 2024, we recorded a $128.2 million net realized loss on investments, consisting of (i) a $127.5 million realized loss related to the extinguishment of the Massachusetts Healthcare Loan and (ii) a $0.7 million realized loss related to the sale of a commercial mortgage loan collateralized by a hotel property located in Honolulu, HI, which was sold at a price of 99.5%. During the year ended December 31, 2023, we recorded a $86.6 million realized loss on investments comprised of (i) a $4.8 million realized loss related to the acquisition of the Atlanta Hotel through a deed-in-lieu of foreclosure and (ii) a $82.0 million realized loss representing a write-off of previously recorded Specific CECL Allowance on one of our subordinate loans secured by an ultra-luxury residential property in Manhattan, NY. These losses were partially offset by a $0.2 million gain on investments recorded in connection with the sale of our entire interest in three commercial loans secured by properties in Europe and a partial interest in one commercial loan secured by property located in London, United Kingdom. During the year ended December 31, 2022, we recorded a $24.9 million realized loss on investments represented with a write-off of a previously recorded Specific CECL Allowance comprised of (i) a $17.9 million loss on a first mortgage loan secured by an urban predevelopment property following the sale of the underlying property, and (ii) a $7.0 million loss, related to a first mortgage secured by the Atlanta hotel in anticipation of consensual foreclosure in the first quarter of 2023.
[2] | Excludes Note receivable, held for sale with an outstanding principal and carrying value of $41.2 million.

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