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Investments - Unrealized Losses and Fair Value of Investments (Details) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Investments [Abstract]    
Less than twelve months, Fair value $ 24,322 $ 45,128
Less than twelve months, Gross unrealized losses (311) (900)
Twelve months or greater, Fair value 298,253 338,630
Twelve months or greater, Gross unrealized losses (22,963) (33,270)
Total, Fair value 322,575 383,758
Total, Gross Unrealized Losses (23,274) (34,170)
U.S. Agency Securities [Member]    
Investments [Abstract]    
Less than twelve months, Fair value 0 0
Less than twelve months, Gross unrealized losses 0 0
Twelve months or greater, Fair value 46,764 51,470
Twelve months or greater, Gross unrealized losses (3,247) (5,113)
Total, Fair value 46,764 51,470
Total, Gross Unrealized Losses (3,247) (5,113)
U.S. Treasury Securities [Member]    
Investments [Abstract]    
Less than twelve months, Fair value 0 5,553
Less than twelve months, Gross unrealized losses 0 (11)
Twelve months or greater, Fair value 84,082 110,992
Twelve months or greater, Gross unrealized losses (2,774) (5,713)
Total, Fair value 84,082 116,545
Total, Gross Unrealized Losses (2,774) (5,724)
Obligations of State and Political Subdivisions [Member]    
Investments [Abstract]    
Less than twelve months, Fair value 2,352 4,186
Less than twelve months, Gross unrealized losses (124) (39)
Twelve months or greater, Fair value 74,750 86,773
Twelve months or greater, Gross unrealized losses (6,814) (8,200)
Total, Fair value 77,102 90,959
Total, Gross Unrealized Losses (6,938) (8,239)
Corporate Obligations [Member]    
Investments [Abstract]    
Less than twelve months, Fair value 0 345
Less than twelve months, Gross unrealized losses 0 (33)
Twelve months or greater, Fair value 6,516 6,970
Twelve months or greater, Gross unrealized losses (484) (1,032)
Total, Fair value 6,516 7,315
Total, Gross Unrealized Losses (484) (1,065)
Mortgage-backed Securities in Government Sponsored Entities [Member]    
Investments [Abstract]    
Less than twelve months, Fair value 21,970 35,044
Less than twelve months, Gross unrealized losses (187) (817)
Twelve months or greater, Fair value 86,141 82,425
Twelve months or greater, Gross unrealized losses (9,644) (13,212)
Total, Fair value 108,111 117,469
Total, Gross Unrealized Losses $ (9,831) $ (14,029)