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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Changes in AOCI) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Jun. 30, 2025 | Mar. 31, 2025 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Changes in each component of AOCI, net of tax |  |  |  |  |  |  |  |
Beginning balance | $ 568,874 | $ 557,376 | $ 538,385 | $ 518,647 | $ 507,203 | $ 503,815 | $ 538,385 | $ 503,815
Other comprehensive income | 9,602 | 1,907 | 10,857 | 18,177 | 1,632 | (1,727) | 22,366 | 18,082
Ending balance | 588,066 | 568,874 | 557,376 | 543,725 | 518,647 | 507,203 | 588,066 | 543,725
Investment Securities |  |  |  |  |  |  |  |
Changes in each component of AOCI, net of tax |  |  |  |  |  |  |  |
Beginning balance | (106,060) |  | (121,491) | (130,248) |  | (127,922) | (121,491) | (127,922)
Other comprehensive income (loss) before reclassifications | 8,670 |  |  | 19,942 |  |  | 21,653 | 15,036
Reclassification adjustments from AOCI | 1,361 |  |  | 1,413 |  |  | 3,809 | 3,993
Other comprehensive income | 10,031 |  |  | 21,355 |  |  | 25,462 | 19,029
Ending balance | (96,029) | (106,060) |  | (108,893) | (130,248) |  | (96,029) | (108,893)
Derivatives |  |  |  |  |  |  |  |
Changes in each component of AOCI, net of tax |  |  |  |  |  |  |  |
Beginning balance | 3,827 |  | 6,494 | 7,260 |  | 5,029 | 6,494 | 5,029
Other comprehensive income (loss) before reclassifications | (429) |  |  | (3,177) |  |  | (3,096) | 946
Reclassification adjustments from AOCI | 0 |  |  | 0 |  |  | 0 | 0
Other comprehensive income | (429) |  |  | (3,177) |  |  | (3,096) | (946)
Ending balance | 3,398 | 3,827 |  | 4,083 | 7,260 |  | 3,398 | 4,083
SERP |  |  |  |  |  |  |  |
Changes in each component of AOCI, net of tax |  |  |  |  |  |  |  |
Beginning balance | 575 |  | 575 | 297 |  | 297 | 575 | 297
Other comprehensive income (loss) before reclassifications | 0 |  |  | 0 |  |  | 0 | 0
Reclassification adjustments from AOCI | 0 |  |  | (1) |  |  | 0 | (1)
Other comprehensive income | 0 |  |  | (1) |  |  | 0 | (1)
Ending balance | 575 | 575 |  | 296 | 297 |  | 575 | 296
Accum. Other Comp. Loss |  |  |  |  |  |  |  |
Changes in each component of AOCI, net of tax |  |  |  |  |  |  |  |
Beginning balance | (101,658) | (103,565) | (114,422) | (122,691) | (124,323) | (122,596) | (114,422) | (122,596)
Other comprehensive income (loss) before reclassifications | 8,241 |  |  | 16,765 |  |  | 18,557 | 14,090
Reclassification adjustments from AOCI | 1,361 |  |  | 1,412 |  |  | 3,809 | 3,992
Other comprehensive income | 9,602 | 1,907 | 10,857 | 18,177 | 1,632 | (1,727) | 22,366 | 18,082
Ending balance | $ (92,056) | $ (101,658) | $ (103,565) | $ (104,514) | $ (122,691) | $ (124,323) | $ (92,056) | $ (104,514)

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