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Investment Securities - Securities Temporarily Impaired (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023
--- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | $ 14,235 | $ 3,794 | $ 27,197
Unrealized Losses (Less than 12 months) | (108) | (63) | (1,264)
Fair Value (Estimated) (12 months or more) | 245,549 | 257,711 | 246,627
Unrealized Losses (12 months or more) | (54,858) | (50,342) | (54,199)
Fair Value (Estimated) | 259,784 | 261,505 | 273,824
Unrealized Losses | (54,966) | (50,405) | (55,463)
U.S. Treasury & Agency securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | 0 | 0 | 0
Unrealized Losses (Less than 12 months) | 0 | 0 | 0
Fair Value (Estimated) (12 months or more) | 19,778 | 19,830 | 19,361
Unrealized Losses (12 months or more) | (6,260) | (6,203) | (6,668)
Fair Value (Estimated) | 19,778 | 19,830 | 19,361
Unrealized Losses | (6,260) | (6,203) | (6,668)
Mortgage-backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | 8,451 | 1,712 | 19,062
Unrealized Losses (Less than 12 months) | (43) | (14) | (974)
Fair Value (Estimated) (12 months or more) | 197,155 | 208,717 | 201,093
Unrealized Losses (12 months or more) | (41,758) | (38,477) | (40,959)
Fair Value (Estimated) | 205,606 | 210,429 | 220,155
Unrealized Losses | (41,801) | (38,491) | (41,933)
State and political subdivisions |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | 4,484 | 2,082 | 8,135
Unrealized Losses (Less than 12 months) | (62) | (49) | (290)
Fair Value (Estimated) (12 months or more) | 28,616 | 27,700 | 24,656
Unrealized Losses (12 months or more) | (6,840) | (5,653) | (6,525)
Fair Value (Estimated) | 33,100 | 29,782 | 32,791
Unrealized Losses | (6,902) | (5,702) | (6,815)
Asset-backed securities |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Fair Value (Estimated) (Less than 12 months) | 1,300 | 0 | 0
Unrealized Losses (Less than 12 months) | (3) | 0 | 0
Fair Value (Estimated) (12 months or more) | 0 | 1,464 | 1,517
Unrealized Losses (12 months or more) | 0 | (9) | (47)
Fair Value (Estimated) | 1,300 | 1,464 | 1,517
Unrealized Losses | $ (3) | $ (9) | $ (47)

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