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Investments, Amortized Cost, Gross Unrealized Gains and Losses and Fair Value of Investment (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Debt Securities [Abstract] |  |
Amortized cost | $ 445,756 | $ 453,343
Gross unrealized gains | 710 | 285
Gross unrealized losses | (27,276) | (36,027)
Allowance for credit losses | 0 | 0
Fair value | 419,190 | 417,601
U.S. Agency Securities [Member] |  |
Debt Securities [Abstract] |  |
Amortized cost | 59,579 | 66,569
Gross unrealized gains | 5 | 1
Gross unrealized losses | (3,970) | (5,799)
Allowance for credit losses | 0 | 0
Fair value | 55,614 | 60,771
U.S. Treasury Securities [Member] |  |
Debt Securities [Abstract] |  |
Amortized cost | 128,637 | 152,485
Gross unrealized gains | 0 | 0
Gross unrealized losses | (5,333) | (9,197)
Allowance for credit losses | 0 | 0
Fair value | 123,304 | 143,288
Obligations of State and Political Subdivisions [Member] |  |
Debt Securities [Abstract] |  |
Amortized cost | 104,005 | 107,945
Gross unrealized gains | 25 | 32
Gross unrealized losses | (6,588) | (6,190)
Allowance for credit losses | 0 | 0
Fair value | 97,442 | 101,787
Corporate Obligations [Member] |  |
Debt Securities [Abstract] |  |
Amortized cost | 13,436 | 13,394
Gross unrealized gains | 290 | 245
Gross unrealized losses | (1,085) | (1,236)
Allowance for credit losses | 0 | 0
Fair value | 12,641 | 12,403
Mortgage-backed Securities in Government Sponsored Entities [Member] |  |
Debt Securities [Abstract] |  |
Amortized cost | 140,099 | 112,950
Gross unrealized gains | 390 | 7
Gross unrealized losses | (10,300) | (13,605)
Allowance for credit losses | 0 | 0
Fair value | $ 130,189 | $ 99,352

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