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INVESTMENT SECURITIES - Fair value and unrealized losses on investments (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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AVAILABLE-FOR-SALE SECURITIES: |  |
Available-for-sale securities, Less than 12 Months, Fair Value | $ 100,652 | $ 21,180
Available-for-sale Securities, Less than 12 Months, Unrealized Loss | (1,293) | (358)
Available-for-sale securities, 12 Months or More, Fair Value | 432,849 | 435,747
Available-for-sale Securities,12 Months or Longer, Unrealized Loss | (61,576) | (53,861)
Available-for-sale securities, Fair Value | 533,501 | 456,927
Available-for-sale securities, Unrealized Loss | (62,869) | (54,219)
HELD-TO-MATURITY SECURITIES: |  |
Held-to-maturity securities, 12 Months or Longer, Fair Value | 165,165 | 171,193
Held-to-maturity securities, 12 Months or Longer, Unrealized Losses | (26,059) | (23,830)
Held-to-maturity securities, Fair Value | 165,165 | 171,193
Held-to-maturity securities, Unrealized Losses | (26,059) | (23,830)
Agency mortgage-backed securities. |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Available-for-sale securities, Less than 12 Months, Fair Value | 49,031 | 4,318
Available-for-sale Securities, Less than 12 Months, Unrealized Loss | (813) | (9)
Available-for-sale securities, 12 Months or More, Fair Value | 260,805 | 274,801
Available-for-sale Securities,12 Months or Longer, Unrealized Loss | (41,082) | (35,881)
Available-for-sale securities, Fair Value | 309,836 | 279,119
Available-for-sale securities, Unrealized Loss | (41,895) | (35,890)
HELD-TO-MATURITY SECURITIES: |  |
Held-to-maturity securities, 12 Months or Longer, Fair Value | 64,513 | 66,245
Held-to-maturity securities, 12 Months or Longer, Unrealized Losses | (9,310) | (8,686)
Held-to-maturity securities, Fair Value | 64,513 | 66,245
Held-to-maturity securities, Unrealized Losses | (9,310) | (8,686)
Agency collateralized mortgage obligations |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Available-for-sale securities, Less than 12 Months, Fair Value | 41,393 | 9,080
Available-for-sale Securities, Less than 12 Months, Unrealized Loss | (297) | (216)
Available-for-sale securities, 12 Months or More, Fair Value | 74,572 | 66,866
Available-for-sale Securities,12 Months or Longer, Unrealized Loss | (10,196) | (9,827)
Available-for-sale securities, Fair Value | 115,965 | 75,946
Available-for-sale securities, Unrealized Loss | (10,493) | (10,043)
HELD-TO-MATURITY SECURITIES: |  |
Held-to-maturity securities, 12 Months or Longer, Fair Value | 95,150 | 99,241
Held-to-maturity securities, 12 Months or Longer, Unrealized Losses | (16,081) | (14,662)
Held-to-maturity securities, Fair Value | 95,150 | 99,241
Held-to-maturity securities, Unrealized Losses | (16,081) | (14,662)
Small Business Administration securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Available-for-sale securities, 12 Months or More, Fair Value | 60,402 | 37,969
Available-for-sale Securities,12 Months or Longer, Unrealized Loss | (8,132) | (1,531)
Available-for-sale securities, Fair Value | 60,402 | 37,969
Available-for-sale securities, Unrealized Loss | (8,132) | (1,531)
States and political subdivisions securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Available-for-sale securities, Less than 12 Months, Fair Value | 10,228 | 7,782
Available-for-sale Securities, Less than 12 Months, Unrealized Loss | (183) | (133)
Available-for-sale securities, 12 Months or More, Fair Value | 37,070 | 56,111
Available-for-sale Securities,12 Months or Longer, Unrealized Loss | (2,166) | (6,622)
Available-for-sale securities, Fair Value | 47,298 | 63,893
Available-for-sale securities, Unrealized Loss | (2,349) | (6,755)
HELD-TO-MATURITY SECURITIES: |  |
Held-to-maturity securities, 12 Months or Longer, Fair Value | 5,502 | 5,707
Held-to-maturity securities, 12 Months or Longer, Unrealized Losses | (668) | (482)
Held-to-maturity securities, Fair Value | 5,502 | 5,707
Held-to-maturity securities, Unrealized Losses | $ (668) | $ (482)

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