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INVESTMENT SECURITIES (Investment Securities at an Unrealized Loss Position) (Details) $ in Thousands | Jun. 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 | 229 | 208
Number of HTM investment securities in an unrealized loss position | security | 83 | 82
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | $ 82,722 | $ 19,557
Less Than 12 Months, Unrecognized Losses | (1,820) | (219)
12 Month or Longer, Fair Value | 565,542 | 588,097
12 Month or Longer, Unrecognized Losses | (112,918) | (108,028)
Total Fair Value | 648,264 | 607,654
Total Unrecognized Losses | 114,738 | 108,247
Schedule of Held-to-Maturity Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 8,048 | 8,853
Less Than 12 Months, Unrecognized Losses | (76) | (33)
12 Month or Longer, Fair Value | 520,040 | 547,631
12 Month or Longer, Unrecognized Losses | (87,703) | (67,188)
Total Fair Value | 528,088 | 556,484
Total Unrecognized Losses | (87,779) | (67,221)
States and political subdivisions |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 8,438 | 534
Less Than 12 Months, Unrecognized Losses | (109) | (1)
12 Month or Longer, Fair Value | 110,179 | 114,601
12 Month or Longer, Unrecognized Losses | (30,190) | (29,809)
Total Fair Value | 118,617 | 115,135
Total Unrecognized Losses | 30,299 | 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 | 33,864 | 35,253
12 Month or Longer, Unrecognized Losses | (8,138) | (6,706)
Total Fair Value | 33,864 | 35,253
Total Unrecognized Losses | (8,138) | (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 | 31,463 | 31,414
12 Month or Longer, Unrecognized Losses | (4,029) | (4,317)
Total Fair Value | 31,463 | 31,414
Total Unrecognized Losses | 4,029 | 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 | 26,659 | 2,893
Less Than 12 Months, Unrecognized Losses | (195) | (87)
12 Month or Longer, Fair Value | 15,239 | 16,286
12 Month or Longer, Unrecognized Losses | (1,883) | (1,854)
Total Fair Value | 41,898 | 19,179
Total Unrecognized Losses | 2,078 | 1,941
Residential - U.S. government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 19,271 | 0
Less Than 12 Months, Unrecognized Losses | (181) | 0
12 Month or Longer, Fair Value | 325,104 | 367,887
12 Month or Longer, Unrecognized Losses | (62,043) | (63,607)
Total Fair Value | 344,375 | 367,887
Total Unrecognized Losses | 62,224 | 63,607
Schedule of Held-to-Maturity Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 8,048 | 8,853
Less Than 12 Months, Unrecognized Losses | (76) | (33)
12 Month or Longer, Fair Value | 486,176 | 512,378
12 Month or Longer, Unrecognized Losses | (79,565) | (60,482)
Total Fair Value | 494,224 | 521,231
Total Unrecognized Losses | (79,641) | (60,515)
Residential - Non-government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 5,437 | 0
Less Than 12 Months, Unrecognized Losses | (101) | 0
12 Month or Longer, Fair Value | 7,826 | 8,169
12 Month or Longer, Unrecognized Losses | (1,040) | (980)
Total Fair Value | 13,263 | 8,169
Total Unrecognized Losses | 1,141 | 980
Commercial - U.S. government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 22,917 | 6,467
Less Than 12 Months, Unrecognized Losses | (1,234) | (1)
12 Month or Longer, Fair Value | 60,595 | 44,447
12 Month or Longer, Unrecognized Losses | (13,600) | (7,403)
Total Fair Value | 83,512 | 50,914
Total Unrecognized Losses | 14,834 | 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 | 15,136 | 5,293
12 Month or Longer, Unrecognized Losses | (133) | (58)
Total Fair Value | 15,136 | 14,956
Total Unrecognized Losses | $ 133 | $ 188

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