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Investments - Unrealized Losses and Fair Value of Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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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)

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