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Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Schedule of Mortgage Loans by Property Type and Geographic Distribution (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 8,708,214 | $ 7,890,848 |
General CECL allowance | (26,224) | (33,588) |
Carrying value, net | $ 8,681,990 | $ 7,857,260 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 100.00% | 100.00% |
General CECL Allowance on unfunded commitments | $ 4,347 | $ 3,106 | $ 3,365
United Kingdom |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 2,470,532 | $ 2,297,286 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 28.40% | 29.10% |
New York City |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 2,049,493 | $ 2,000,661 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 23.50% | 25.40% |
Other Europe |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 1,542,462 | $ 1,295,870 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 17.70% | 16.40% |
Italy |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 540.00% | 2.60% |
Germany |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 490.00% | 6.10% |
Spain |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 3.80% | 3.30% |
Sweden |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 280.00% | 3.60% |
Ireland |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 0.70% | 0.80% |
Midwest |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 592,756 | $ 689,274 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 6.80% | 8.70% |
Southeast |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 642,542 | $ 708,920 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 7.40% | 9.00% |
West |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 584,247 | $ 356,097 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 6.70% | 4.50% |
Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 826,182 | $ 542,740 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 9.50% | 6.90% |
Percentage of Portfolio | 30.00% | 0.30% |
Northeast |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 550.00% | 1.50% |
Southwest |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 230.00% | 3.50% |
Mid-Atlantic |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 140.00% | 1.60% |
Hotel |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 2,117,079 | $ 1,875,439 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 24.30% | 23.80% |
Office |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 1,671,006 | $ 1,700,779 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 19.20% | 21.60% |
Residential |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 1,537,541 | $ 1,434,186 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 17.70% | 18.20% |
Retail Site |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 1,364,752 | $ 1,126,332 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 15.70% | 14.30% |
Health Care |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 575,144 | $ 316,321 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 6.60% | 4.00% |
Mixed Use |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 559,809 | $ 269,839 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 6.40% | 3.40% |
Industrial Property |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 296,860 | $ 377,068 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 3.40% | 4.80% |
Other |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Carrying Value | $ 586,023 | $ 790,884 |
Mortgage loans on real estate, commercial and consumer, percentage of portfolio | 6.70% | 9.90% |
Parking Garage |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 3.10% | 3.30% |
Caravan Park |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 2.30% | 2.80% |
Multifamily Development |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio |  | 2.20% |
Urban Predevelopment |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Percentage of Portfolio | 130.00% | 1.60% |

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