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Schedule IV - Mortgage Loans on Real Estate - Summary of Changes in Carrying Amounts of Mortgage Loans (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
SEC Schedule, 12-29, Real Estate Companies, Investment in Movement in Mortgage Loans on Real Estate [Roll Forward] |  |  |  |
Balance at beginning of year |  | $ 8,358,093 | $ 8,681,990 | $ 7,857,260
Loan fundings |  | 1,871,792 | 929,106 | 3,624,661
Loan repayments and sales |  | (2,541,740) | (1,225,930) | (2,214,621)
Gain (loss) on foreign currency translation |  | (133,477) | 175,707 | (356,436)
Realized loss on investments | [1] | (128,191) | (86,604) | (24,894)
Transfer to Other Assets |  | (159,667) | (75,000) | (226,459)
Decrease (increase) in Specific CECL Allowance | [2] | (149,500) | (59,500) | 11,500
Decrease (increase) in General CECL Allowance | [3] | (4,354) | (258) | (7,364)
Deferred Fees and other items | [4] | (39,554) | (16,453) | (46,874)
Payment-in-kind interest and amortization of fees |  | 30,754 | 35,035 | 50,489
Balance at the close of year |  | $ 7,104,156 | $ 8,358,093 | $ 8,681,990
[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] | During the year ended December 31, 2024, we recorded a net increase in our Specific CECL Allowance of $149.5 million. This net increase was comprised of Specific CECL Allowances on two of our mezzanine loans and a Specific CECL Allowance on our Massachusetts Healthcare Loan, which was subsequently fully written off. During the year ended Decembe r 31, 2023, the Specific CECL Allowance increased $59.5 million. We recorded a $141.5 million increase to our Specific CECL Allowance, related to two mezzanine loans secured by the same ultra-luxury residential property in Manhattan, NY. As of June 30, 2023, $82.0 million related to the most junior mezzanine loan was deemed unrecoverable. Accordingly, $82.0 million of previously recorded Specific CECL was written-off and recorded as a realized loss within net realized loss on investments during the second quarter of 2023. The $11.5 million decrease during the year ended December 31, 2022 was comprised of (i) a reversal and write-off of a previously recorded Specific CECL Allowance of $53.0 million and $15.0 million, respectively, on an urban predevelopment first mortgage loan in Miami, FL and (ii) a $10.0 million reversal of a previously recorded Specific CECL Allowance on a loan related to a multifamily development in Brooklyn, NY. These write-offs and reversals recorded during the year ended December 31, 2022 were offset by the Specific CECL Allowance of $66.5 million recorded in relation to a mezzanine loan secured by our interest in an ultra-luxury residential property in Manhattan, NY.
[3] | $5.9 million, $4.0 million, and $4.3 million as of December 31, 2024, 2023, and 2022, respectively, of the General CECL Allowance is excluded from this table because it relates to unfunded commitments and has been recorded as a liability on our consolidated balance sheets.
[4] | Other items primarily consist of purchase discounts or premiums, exit fees and deferred origination expenses, as well as $9.1 million, $2.5 million, and $3.2 million in cost recovery proceeds in 2024, 2023, and 2022, respectively.

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