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Investments - Unrealized Loss Position (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Schedule of Held-to-Maturity Securities [Line Items]    
Less than 12 months, Fair Value $ 4,162 $ 5,126
Less than 12 months, Unrealized Losses (132) (286)
12 Months or More, Fair Value 8,703 6,671
12 Months or More, Unrealized Losses (1,841) (1,283)
Total, Fair Value 12,865 11,797
Total, Unrealized Losses (1,973) (1,569)
Mortgage-backed securities    
Schedule of Held-to-Maturity Securities [Line Items]    
Less than 12 months, Fair Value 722 2,374
Less than 12 months, Unrealized Losses (34) (190)
12 Months or More, Fair Value 5,466 3,962
12 Months or More, Unrealized Losses (1,008) (635)
Total, Fair Value 6,188 6,336
Total, Unrealized Losses (1,042) (825)
Collateralized mortgage obligations    
Schedule of Held-to-Maturity Securities [Line Items]    
Less than 12 months, Fair Value 3,440 2,752
Less than 12 months, Unrealized Losses (98) (96)
12 Months or More, Fair Value 3,237 2,709
12 Months or More, Unrealized Losses (833) (648)
Total, Fair Value 6,677 5,461
Total, Unrealized Losses $ (931) $ (744)