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Real Estate Securities - Gross Realized Gains and Losses on Sales and Calls of Available for Sale Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Debt Securities, Available-for-sale [Line Items]        
Total Realized Gains on Sales and Calls of AFS Securities, net $ 0 $ 6,389 $ 1,914 $ 16,991
Sales        
Debt Securities, Available-for-sale [Line Items]        
Gross realized gains 0 0 0 1,507
Gross realized losses - sales 0 0 0 0
Calls        
Debt Securities, Available-for-sale [Line Items]        
Gross realized gains $ 0 $ 6,389 $ 1,914 $ 15,484