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INVESTMENT SECURITIES (Investment Securities at an Unrealized Loss Position) (Details) $ in Thousands | Sep. 30, 2025 USD ($) security | Dec. 31, 2024 USD ($) security
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Investments, Debt and Equity Securities [Abstract] |  |
Number of AFS investment securities in an unrealized loss position | security | 183 | 218
Number of HTM investment securities in an unrealized loss position | security | 81 | 83
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | $ 57,672 | $ 255,136
Less Than 12 Months, Unrecognized Losses | (200) | (3,452)
12 Month or Longer, Fair Value | 442,341 | 436,723
12 Month or Longer, Unrecognized Losses | (80,691) | (103,016)
Total Fair Value | 500,013 | 691,859
Total Unrecognized Losses | 80,891 | 106,468
Schedule of Held-to-Maturity Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 7,470
Less Than 12 Months, Unrecognized Losses | 0 | (19)
12 Month or Longer, Fair Value | 489,749 | 499,211
12 Month or Longer, Unrecognized Losses | (70,164) | (90,230)
Total Fair Value | 489,749 | 506,681
Total Unrecognized Losses | (70,164) | (90,249)
States and political subdivisions |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 0 | 4,967
Less Than 12 Months, Unrecognized Losses | 0 | (85)
12 Month or Longer, Fair Value | 107,238 | 107,267
12 Month or Longer, Unrecognized Losses | (25,780) | (30,098)
Total Fair Value | 107,238 | 112,234
Total Unrecognized Losses | 25,780 | 30,183
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 | 33,540 | 33,132
12 Month or Longer, Unrecognized Losses | (8,416) | (8,884)
Total Fair Value | 33,540 | 33,132
Total Unrecognized Losses | (8,416) | (8,884)
U.S. Treasury and other government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 21,728 | 56,139
Less Than 12 Months, Unrecognized Losses | (81) | (803)
12 Month or Longer, Fair Value | 12,189 | 12,971
12 Month or Longer, Unrecognized Losses | (1,458) | (1,939)
Total Fair Value | 33,917 | 69,110
Total Unrecognized Losses | 1,539 | 2,742
Collateralized loan obligations |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 31,084 | 31,140
Less Than 12 Months, Unrecognized Losses | (118) | (114)
12 Month or Longer, Fair Value | 0 | 0
12 Month or Longer, Unrecognized Losses | 0 | 0
Total Fair Value | 31,084 | 31,140
Total Unrecognized Losses | 118 | 114
Residential - U.S. government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 0 | 135,224
Less Than 12 Months, Unrecognized Losses | 0 | (2,254)
12 Month or Longer, Fair Value | 266,084 | 260,575
12 Month or Longer, Unrecognized Losses | (40,905) | (55,793)
Total Fair Value | 266,084 | 395,799
Total Unrecognized Losses | 40,905 | 58,047
Schedule of Held-to-Maturity Securities [Line Items] |  |
Less Than 12 Months, Fair Value | 0 | 7,470
Less Than 12 Months, Unrecognized Losses | 0 | (19)
12 Month or Longer, Fair Value | 456,209 | 466,079
12 Month or Longer, Unrecognized Losses | (61,748) | (81,346)
Total Fair Value | 456,209 | 473,549
Total Unrecognized Losses | (61,748) | (81,365)
Residential - Non-government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 4,860 | 5,270
Less Than 12 Months, Unrecognized Losses | (1) | (100)
12 Month or Longer, Fair Value | 7,194 | 7,606
12 Month or Longer, Unrecognized Losses | (720) | (961)
Total Fair Value | 12,054 | 12,876
Total Unrecognized Losses | 721 | 1,061
Commercial - U.S. government-sponsored entities and agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value | 0 | 12,469
Less Than 12 Months, Unrecognized Losses | 0 | (90)
12 Month or Longer, Fair Value | 49,636 | 48,304
12 Month or Longer, Unrecognized Losses | (11,828) | (14,225)
Total Fair Value | 49,636 | 60,773
Total Unrecognized Losses | $ 11,828 | 14,315
Commercial - Non-government agencies |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Less than 12 months, Fair Value |  | 9,927
Less Than 12 Months, Unrecognized Losses |  | (6)
12 Month or Longer, Fair Value |  | 0
12 Month or Longer, Unrecognized Losses |  | 0
Total Fair Value |  | 9,927
Total Unrecognized Losses |  | $ 6

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