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Securities - Unrealized Loss Positions (Details) | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 USD ($) security | Dec. 31, 2023 USD ($)
Fair value |  |
Less Than 12 Months, Fair Value | $ 12,583,000 | $ 13,573,000
12 Months or More, Fair Value | 288,030,000 | 365,904,000
Total Fair Value | 300,613,000 | 379,477,000
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 103,000 | 504,000
12 Months or More, Unrealized Loss | 24,501,000 | 33,609,000
Total Unrealized Loss | $ 24,604,000 | 34,113,000
Other information |  |
Number of positions | security | 465 |
Aggregate fair value | $ 300,613,000 | 379,477,000
Other than temporary impairment | 0 |
U.S. Treasury securities |  |
Fair value |  |
12 Months or More, Fair Value | 10,684,000 | 45,103,000
Total Fair Value | 10,684,000 | 45,103,000
Unrealized Loss |  |
12 Months or More, Unrealized Loss | 293,000 | 780,000
Total Unrealized Loss | 293,000 | 780,000
Other information |  |
Aggregate fair value | 10,684,000 | 45,103,000
U.S. government agencies and corporations |  |
Fair value |  |
12 Months or More, Fair Value | 63,669,000 | 87,094,000
Total Fair Value | 63,669,000 | 87,094,000
Unrealized Loss |  |
12 Months or More, Unrealized Loss | 6,727,000 | 9,313,000
Total Unrealized Loss | 6,727,000 | 9,313,000
Other information |  |
Aggregate fair value | 63,669,000 | 87,094,000
Mortgage-backed securities |  |
Fair value |  |
Less Than 12 Months, Fair Value | 2,615,000 | 5,528,000
12 Months or More, Fair Value | 132,043,000 | 150,023,000
Total Fair Value | 134,658,000 | 155,551,000
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 27,000 | 68,000
12 Months or More, Unrealized Loss | 11,394,000 | 16,155,000
Total Unrealized Loss | 11,421,000 | 16,223,000
Other information |  |
Aggregate fair value | 134,658,000 | 155,551,000
Obligations of states and political subdivisions |  |
Fair value |  |
Less Than 12 Months, Fair Value | 9,484,000 | 4,659,000
12 Months or More, Fair Value | 62,583,000 | 65,630,000
Total Fair Value | 72,067,000 | 70,289,000
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 60,000 | 72,000
12 Months or More, Unrealized Loss | 3,230,000 | 3,972,000
Total Unrealized Loss | 3,290,000 | 4,044,000
Other information |  |
Aggregate fair value | 72,067,000 | 70,289,000
Corporate and other debt securities |  |
Fair value |  |
Less Than 12 Months, Fair Value | 484,000 | 3,386,000
12 Months or More, Fair Value | 19,051,000 | 18,054,000
Total Fair Value | 19,535,000 | 21,440,000
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 16,000 | 364,000
12 Months or More, Unrealized Loss | 2,857,000 | 3,389,000
Total Unrealized Loss | 2,873,000 | 3,753,000
Other information |  |
Aggregate fair value | $ 19,535,000 | $ 21,440,000

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