v3.22.2.2
Commercial Mortgage Loans, Subordinate Loans and Other Lending Assets, Net - Schedule of Mortgage Loans by Property Type and Geographic Distribution (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Aug. 03, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 8,753,291 $ 7,890,848              
General CECL allowance (21,985) (33,588)              
Carrying value, net $ 8,731,306 $ 7,857,260 $ 226,500            
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 100.00% 100.00%              
General CECL Allowance on unfunded commitments $ 2,812 $ 3,106   $ 3,999 $ 3,928 $ 2,193 $ 2,444 $ 3,794 $ 3,365
United Kingdom                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 2,300,384 $ 2,297,286              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 26.30% 29.10%              
New York City                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 2,240,469 $ 2,000,661              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 25.60% 25.40%              
Other Europe                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 1,402,047 $ 1,295,870              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 16.00% 16.40%              
Italy                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Percentage of Portfolio 480.00% 2.60%              
Germany                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Percentage of Portfolio 440.00% 6.10%              
Spain                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Percentage of Portfolio 3.50% 3.30%              
Sweden                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Percentage of Portfolio 260.00% 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 $ 623,233 $ 689,274              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 7.10% 8.70%              
Southeast                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 735,912 $ 708,920              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 8.40% 9.00%              
West                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 616,594 $ 356,097              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 7.00% 4.50%              
Other                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 834,652 $ 542,740              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 9.60% 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 240.00% 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 $ 1,983,071 $ 1,875,439              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 22.70% 23.80%              
Office                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 1,750,260 $ 1,700,779              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 20.00% 21.60%              
Residential                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 1,629,031 $ 1,434,186              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 18.60% 18.20%              
Retail Site                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 1,318,862 $ 1,126,332              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 15.10% 14.30%              
Health Care                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 603,150 $ 316,321              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 6.90% 4.00%              
Mixed Use                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 529,200 $ 269,839              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 6.00% 3.40%              
Industrial Property                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 310,516 $ 377,068              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 3.50% 4.80%              
Other                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Carrying Value $ 629,201 $ 790,884              
Mortgage loans on real estate, commercial and consumer, percentage of portfolio 7.20% 9.90%              
Parking Garage                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Percentage of Portfolio 310.00% 3.30%              
Caravan Park                  
Accounts, Notes, Loans and Financing Receivable [Line Items]                  
Percentage of Portfolio 210.00% 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 200.00% 1.60%