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INVESTMENT SECURITIES (Investment Securities at an Unrealized Loss Position) (Details) $ in Thousands | Sep. 30, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
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Investments, Debt and Equity Securities [Abstract] |  |
Number of AFS investment securities in an unrealized loss position | security | 212 | 208
Number of HTM investment securities in an unrealized loss position | security | 82 | 82
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | $ 30,478 | $ 19,557
Less Than 12 Months, Unrecognized Losses | (349) | (219)
12 Month or Longer, Fair Value | 569,919 | 588,097
12 Month or Longer, Unrecognized Losses | (90,062) | (108,028)
Total Fair Value | 600,397 | 607,654
Total Unrecognized Losses | 90,411 | 108,247
Schedule of Held-to-Maturity Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 8,853
Less Than 12 Months, Unrecognized Losses | 0 | (33)
12 Month or Longer, Fair Value | 539,135 | 547,631
12 Month or Longer, Unrecognized Losses | (59,190) | (67,188)
Total Fair Value | 539,135 | 556,484
Total Unrecognized Losses | (59,190) | (67,221)
States and political subdivisions |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 4,600 | 534
Less Than 12 Months, Unrecognized Losses | (33) | (1)
12 Month or Longer, Fair Value | 111,552 | 114,601
12 Month or Longer, Unrecognized Losses | (24,637) | (29,809)
Total Fair Value | 116,152 | 115,135
Total Unrecognized Losses | 24,670 | 29,810
Schedule of Held-to-Maturity Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 0
Less Than 12 Months, Unrecognized Losses | 0 | 0
12 Month or Longer, Fair Value | 34,730 | 35,253
12 Month or Longer, Unrecognized Losses | (7,283) | (6,706)
Total Fair Value | 34,730 | 35,253
Total Unrecognized Losses | (7,283) | (6,706)
Corporate securities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 0 | 0
Less Than 12 Months, Unrecognized Losses | 0 | 0
12 Month or Longer, Fair Value | 32,554 | 31,414
12 Month or Longer, Unrecognized Losses | (2,819) | (4,317)
Total Fair Value | 32,554 | 31,414
Total Unrecognized Losses | 2,819 | 4,317
U.S. Treasury and other government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 1,308 | 2,893
Less Than 12 Months, Unrecognized Losses | (26) | (87)
12 Month or Longer, Fair Value | 14,498 | 16,286
12 Month or Longer, Unrecognized Losses | (1,699) | (1,854)
Total Fair Value | 15,806 | 19,179
Total Unrecognized Losses | 1,725 | 1,941
Residential - U.S. government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 23,295 | 0
Less Than 12 Months, Unrecognized Losses | (183) | 0
12 Month or Longer, Fair Value | 329,454 | 367,887
12 Month or Longer, Unrecognized Losses | (47,871) | (63,607)
Total Fair Value | 352,749 | 367,887
Total Unrecognized Losses | 48,054 | 63,607
Schedule of Held-to-Maturity Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 8,853
Less Than 12 Months, Unrecognized Losses | 0 | (33)
12 Month or Longer, Fair Value | 504,405 | 512,378
12 Month or Longer, Unrecognized Losses | (51,907) | (60,482)
Total Fair Value | 504,405 | 521,231
Total Unrecognized Losses | (51,907) | (60,515)
Residential - Non-government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 0 | 0
Less Than 12 Months, Unrecognized Losses | 0 | 0
12 Month or Longer, Fair Value | 7,992 | 8,169
12 Month or Longer, Unrecognized Losses | (722) | (980)
Total Fair Value | 7,992 | 8,169
Total Unrecognized Losses | 722 | 980
Commercial - U.S. government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 1,275 | 6,467
Less Than 12 Months, Unrecognized Losses | (107) | (1)
12 Month or Longer, Fair Value | 68,444 | 44,447
12 Month or Longer, Unrecognized Losses | (12,307) | (7,403)
Total Fair Value | 69,719 | 50,914
Total Unrecognized Losses | 12,414 | 7,404
Commercial - Non-government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 0 | 9,663
Less Than 12 Months, Unrecognized Losses | 0 | (130)
12 Month or Longer, Fair Value | 5,425 | 5,293
12 Month or Longer, Unrecognized Losses | (7) | (58)
Total Fair Value | 5,425 | 14,956
Total Unrecognized Losses | $ 7 | $ 188

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