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Securities - Unrealized Loss Positions (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) security | Dec. 31, 2022 USD ($)
Fair value |  |
Less Than 12 Months, Fair Value | $ 13,573 | $ 271,692
12 Months or More, Fair Value | 365,904 | 209,967
Total Fair Value | 379,477 | 481,659
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 504 | 12,523
12 Months or More, Unrealized Loss | 33,609 | 32,379
Total Unrealized Loss | $ 34,113 | 44,902
Other information |  |
Number of positions | security | 492 |
Aggregate fair value | $ 379,477 | 481,659
Other than temporary impairment | 0 |
U.S. Treasury securities |  |
Fair value |  |
Less Than 12 Months, Fair Value |  | 50,556
12 Months or More, Fair Value | 45,103 | 8,277
Total Fair Value | 45,103 | 58,833
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss |  | 1,368
12 Months or More, Unrealized Loss | 780 | 685
Total Unrealized Loss | 780 | 2,053
Other information |  |
Aggregate fair value | 45,103 | 58,833
U.S. government agencies and corporations |  |
Fair value |  |
Less Than 12 Months, Fair Value |  | 71,948
12 Months or More, Fair Value | 87,094 | 58,326
Total Fair Value | 87,094 | 130,274
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss |  | 1,578
12 Months or More, Unrealized Loss | 9,313 | 11,389
Total Unrealized Loss | 9,313 | 12,967
Other information |  |
Aggregate fair value | 87,094 | 130,274
Mortgage-backed securities |  |
Fair value |  |
Less Than 12 Months, Fair Value | 5,528 | 73,301
12 Months or More, Fair Value | 150,023 | 104,563
Total Fair Value | 155,551 | 177,864
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 68 | 5,441
12 Months or More, Unrealized Loss | 16,155 | 15,099
Total Unrealized Loss | 16,223 | 20,540
Other information |  |
Aggregate fair value | 155,551 | 177,864
Obligations of states and political subdivisions |  |
Fair value |  |
Less Than 12 Months, Fair Value | 4,659 | 60,838
12 Months or More, Fair Value | 65,630 | 32,120
Total Fair Value | 70,289 | 92,958
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 72 | 2,434
12 Months or More, Unrealized Loss | 3,972 | 4,356
Total Unrealized Loss | 4,044 | 6,790
Other information |  |
Aggregate fair value | 70,289 | 92,958
Corporate and other debt securities |  |
Fair value |  |
Less Than 12 Months, Fair Value | 3,386 | 15,049
12 Months or More, Fair Value | 18,054 | 6,681
Total Fair Value | 21,440 | 21,730
Unrealized Loss |  |
Less Than 12 Months, Unrealized Loss | 364 | 1,702
12 Months or More, Unrealized Loss | 3,389 | 850
Total Unrealized Loss | 3,753 | 2,552
Other information |  |
Aggregate fair value | $ 21,440 | $ 21,730

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