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Schedule IV - Mortgage Loans on Real Estate (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) contract | Dec. 31, 2021 USD ($)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal Balance |  | $ 8,892,767 |
Principal balance |  | 8,708,214 | $ 7,890,848
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | 719,267 |
General CECL allowance |  | (26,224) | (33,588)
Carrying value, net |  | 8,681,990 | 7,857,260
Commercial Mortgage Portfolio Segment |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal Balance |  | 8,260,261 |
Principal balance |  | 8,143,957 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | 381,774 |
General CECL allowance |  | (22,848) | (22,554)
Carrying value, net | [1],[2] | 8,121,109 | 7,012,312
Subordinate Mortgage Portfolio Segment |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal Balance |  | 632,506 |
Principal balance |  | 564,257 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | 337,493 |
General CECL allowance |  | (3,376) | (11,034)
Carrying value, net | [2],[3] | $ 560,881 | 844,948
Retail | Loan A, Retail/United Kingdom |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  |  |
Principal Balance |  | $ 455,732 |
Principal balance |  | 451,718 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 0 |
Retail | Loan B, Retail/United Kingdom |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  |  |
Principal Balance |  | $ 394,878 |
Principal balance |  | 391,805 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 0 |
Retail | First Mortgage, 3 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 3 |
Principal Balance |  | $ 561,383 |
Principal balance |  | 487,447 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | 171,099 |
Health Care |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal balance |  | $ 575,144 | 316,321
Health Care | Loan C, Healthcare/Northeast |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  |  |
Principal Balance |  | $ 374,793 |
Principal balance |  | 370,835 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 0 |
Health Care | First Mortgage, 1, Healthcare/United Kingdom | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 1 |
Basis spread on variable interest rate |  | 7.70% |
Principal Balance |  | $ 154,759 |
Principal balance |  | 153,212 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
Health Care | Other Lending Asset, 1, Healthcare/Various US | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 1 |
Principal Balance |  | $ 51,097 |
Principal balance |  | 51,097 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
Mixed Use |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal balance |  | $ 559,809 | 269,839
Mixed Use | Loan D, Mixed Use/United Kingdom |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  |  |
Principal Balance |  | $ 306,366 |
Principal balance |  | 304,655 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 0 |
Mixed Use | First Mortgage, 3, Mixed Use/Various | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 3 |
Principal Balance |  | $ 255,196 |
Principal balance |  | 255,154 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
Residential |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal balance |  | $ 1,537,541 | 1,434,186
Residential | Loan E, Residential/New York City |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  |  |
Principal Balance |  | $ 276,610 |
Principal balance |  | 274,105 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 0 |
Residential | First Mortgage, 9 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 9 |
Principal Balance |  | $ 805,304 |
Principal balance |  | 801,237 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
Caravan Parks | Loan F, Parking Garage/Various US |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  |  |
Principal Balance |  | $ 271,141 |
Principal balance |  | 270,199 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | 0 |
Hotel |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal balance |  | $ 2,117,079 | 1,875,439
Hotel | Loan G, Hotel/Spain |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  |  |
Principal Balance |  | $ 334,224 |
Principal balance |  | 334,224 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 0 |
Hotel | First Mortgage, 17 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 17 |
Principal Balance |  | $ 1,745,133 |
Principal balance |  | 1,739,394 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 98,246 |
Hotel | SubordinateMortgage, 2, Hotel/Various US | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 2 |
Principal Balance |  | $ 43,511 |
Principal balance |  | 43,462 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
Residential/New York City | SubordinateMortgage, 3, Residential/New York City | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 3 |
Principal Balance |  | $ 530,398 |
Principal balance |  | 462,198 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | 337,493 |
Office |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Principal balance |  | $ 1,671,006 | $ 1,700,779
Office | First Mortgage, 10 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 10 |
Principal Balance |  | $ 1,534,092 |
Principal balance |  | 1,525,489 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  | $ 112,429 |
Office | SubordinateMortgage, 1, Office/Midwest | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 1 |
Principal Balance |  | $ 7,500 |
Principal balance |  | 7,500 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
Industrial | First Mortgage, 1, Industrial/Sweden | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 1 |
Basis spread on variable interest rate |  | 4.70% |
Principal Balance |  | $ 248,064 |
Principal balance |  | 246,409 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
Other | First Mortgage, 3, Other/Various | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Number of loans | contract |  | 3 |
Principal Balance |  | $ 542,586 |
Principal balance |  | 538,074 |
Principal Amount of Mortgages Subject to Delinquent Principal or Interest |  |  |
London Interbank Offered Rate (LIBOR) | Retail | Loan A, Retail/United Kingdom |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 6.70% |
London Interbank Offered Rate (LIBOR) | Retail | Loan B, Retail/United Kingdom |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 6.60% |
London Interbank Offered Rate (LIBOR) | Health Care | Loan C, Healthcare/Northeast |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 8.10% |
London Interbank Offered Rate (LIBOR) | Health Care | Other Lending Asset, 1, Healthcare/Various US | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 9.60% |
London Interbank Offered Rate (LIBOR) | Mixed Use | Loan D, Mixed Use/United Kingdom |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 8.20% |
London Interbank Offered Rate (LIBOR) | Residential | Loan E, Residential/New York City |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 8.60% |
London Interbank Offered Rate (LIBOR) | Caravan Parks | Loan F, Parking Garage/Various US |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 8.30% |
London Interbank Offered Rate (LIBOR) | Hotel | Loan G, Hotel/Spain |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 4.80% |
London Interbank Offered Rate (LIBOR) | Office | SubordinateMortgage, 1, Office/Midwest | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 11.00% |
Minimum | Retail | First Mortgage, 3 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00001% |
Minimum | Mixed Use | First Mortgage, 3, Mixed Use/Various | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 7.90% |
Minimum | Residential | First Mortgage, 9 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 6.70% |
Minimum | Hotel | First Mortgage, 17 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00% |
Minimum | Office | First Mortgage, 10 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 4.60% |
Minimum | Other | First Mortgage, 3, Other/Various | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 4.40% |
Minimum | London Interbank Offered Rate (LIBOR) | Hotel | SubordinateMortgage, 2, Hotel/Various US | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 10.40% |
Minimum | London Interbank Offered Rate (LIBOR) | Residential/New York City | SubordinateMortgage, 3, Residential/New York City | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00% |
Maximum | Retail | First Mortgage, 3 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00001% |
Maximum | Mixed Use | First Mortgage, 3, Mixed Use/Various | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00001% |
Maximum | Residential | First Mortgage, 9 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00001% |
Maximum | Office | First Mortgage, 10 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00001% |
Maximum | Other | First Mortgage, 3, Other/Various | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 0.00001% |
Maximum | London Interbank Offered Rate (LIBOR) | Hotel | First Mortgage, 17 | Commercial Mortgage Portfolio Segment, Loans Less Than 3% Of The Carrying Amount Of Total Senior Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 11.60% |
Maximum | London Interbank Offered Rate (LIBOR) | Hotel | SubordinateMortgage, 2, Hotel/Various US | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 11.50% |
Maximum | London Interbank Offered Rate (LIBOR) | Residential/New York City | SubordinateMortgage, 3, Residential/New York City | Subordinate Mortgage Portfolio Segment, Loans and Other Lending Assets Less Than 3% Of The Carrying Amount Of Total Subordinate Loans |  |  |
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items] |  |  |
Basis spread on variable interest rate |  | 13.10% |
[1] | Includes $7,482,658 and $5,957,707 pledged as collateral under secured debt arrangements in 2022 and 2021, respectively.
[2] | Net of $159,724 and $178,588 CECL Allowance in 2022 and 2021, respectively, comprised of $133,500 and $145,000 Specific CECL Allowance and $26,224 and $33,588 General CECL Allowance, respectively.
[3] | Includes $191,608 and $0 pledged as collateral under secured debt arrangements in 2022 and 2021, respectively.

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