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Securities - Available for sale Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 510,597 | $ 557,128
Gross Unrealized Gains | 99 | 365
Gross Unrealized Losses | (50,043) | (44,902)
Fair Value | 460,653 | 512,591
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 52,785 | 60,886
Gross Unrealized Losses | (1,391) | (2,053)
Fair Value | 51,394 | 58,833
U.S. government agencies and corporations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 106,455 | 143,241
Gross Unrealized Losses | (12,405) | (12,967)
Fair Value | 94,050 | 130,274
Mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 183,552 | 200,393
Gross Unrealized Gains | 2 | 65
Gross Unrealized Losses | (23,239) | (20,540)
Fair Value | 160,315 | 179,918
Obligations of states and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 142,593 | 127,317
Gross Unrealized Gains | 97 | 300
Gross Unrealized Losses | (8,525) | (6,790)
Fair Value | 134,165 | 120,827
Corporate and other debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 25,212 | 25,291
Gross Unrealized Losses | (4,483) | (2,552)
Fair Value | $ 20,729 | $ 22,739

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-2 + Details
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