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Investments in Securities - Available for sale securities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | $ 531,892 | $ 553,214
Gross Unrealized Gains | 534 | 119
Gross Unrealized Losses | 54,219 | 62,741
Fair Value | 478,207 | 490,592
Agency mortgage-backed securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 316,114 | 327,266
Gross Unrealized Gains | 7 |
Gross Unrealized Losses | 35,890 | 40,784
Fair Value | 280,231 | 286,482
Agency collateralized mortgage obligations |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 85,989 | 90,205
Gross Unrealized Losses | 10,043 | 11,731
Fair Value | 75,946 | 78,474
States and political subdivisions securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 59,141 | 60,667
Gross Unrealized Gains | 527 | 119
Gross Unrealized Losses | 1,531 | 3,291
Fair Value | 58,137 | 57,495
Small Business Administration securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 70,648 | 75,076
Gross Unrealized Losses | 6,755 | 6,935
Fair Value | $ 63,893 | $ 68,141

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