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Investments - Held-to-Maturity Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost $ 15,840 $ 14,292
Unrealized Gain 0 5
Unrealized Loss (1,973) (1,569)
Estimated Fair Value 13,867 12,728
Mortgage-backed securities    
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 7,230 8,087
Unrealized Gain 0 5
Unrealized Loss (1,042) (825)
Estimated Fair Value 6,188 7,267
Collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Amortized Cost 8,610 6,205
Unrealized Gain 0 0
Unrealized Loss (931) (744)
Estimated Fair Value $ 7,679 $ 5,461