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Mortgage-Backed Securities (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2024
USD ($)
Mortgage-backed securities  
Fair Value $ 524,576
Principal-Only-Strip MBS  
Mortgage-backed securities  
Contractual maturities term 10 years
Principal Balance $ 654,884
Unearned discounts (129,997)
Cumulative valuation changes (311)
Fair Value $ 524,576