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Investment Securities - Available-for-Sale RMBS (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost $ 91,218 $ 92,431
Credit Loss Allowance 0 0
Net Basis 91,218 92,431
Gross Unrealized Gains 21,697 21,765
Gross Unrealized Losses (1,846) (810)
Net Fair Value Adjustment 19,851 20,955
Fair Value $ 111,069 $ 113,386
LIBOR | Available-for-sale    
Debt Securities, Available-for-sale [Line Items]    
Effective variable rate basis 4.858%  
RMBS | B- Rating | Available-for-sale    
Debt Securities, Available-for-sale [Line Items]    
Weighted Average Coupon 5.20%  
WAL (Years) 7 years 3 months 18 days