FAIR VALUE DISCLOSURES - Assets and Liabilities Measured At Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Assets:
Total securities available-for-sale	$ 1,014,481	$ 1,051,728
Mortgage banking derivative	30,365	27,189
Liabilities:
Mortgage banking derivative	30,365	27,190
Fair Value, Measurements, Recurring
Assets:
U.S. government sponsored agency securities	116,452	119,479
Mortgage-backed securities: residential	432,018	447,842
State and municipal securities	466,011	484,407
Total securities available-for-sale	1,014,481	1,051,728
Mortgage banking derivative	97	47
Interest rate swap derivative	30,365	27,189
Total assets	1,044,943	1,078,964
Liabilities:
Mortgage banking derivative	9	11
Interest rate swap derivative	30,365	27,190
Total liabilities	30,374	27,201
Level 1 | Fair Value, Measurements, Recurring
Assets:
U.S. government sponsored agency securities	0	0
Mortgage-backed securities: residential	0	0
State and municipal securities	0	0
Total securities available-for-sale	0	0
Mortgage banking derivative	0	0
Interest rate swap derivative	0	0
Total assets	0	0
Liabilities:
Mortgage banking derivative	0	0
Interest rate swap derivative	0	0
Total liabilities	0	0
Level 2 | Fair Value, Measurements, Recurring
Assets:
U.S. government sponsored agency securities	116,452	119,479
Mortgage-backed securities: residential	432,018	447,842
State and municipal securities	463,773	482,127
Total securities available-for-sale	1,012,243	1,049,448
Mortgage banking derivative	97	47
Interest rate swap derivative	30,365	27,189
Total assets	1,042,705	1,076,684
Liabilities:
Mortgage banking derivative	9	11
Interest rate swap derivative	30,365	27,190
Total liabilities	30,374	27,201
Level 3 | Fair Value, Measurements, Recurring
Assets:
U.S. government sponsored agency securities	0	0
Mortgage-backed securities: residential	0	0
State and municipal securities	2,238	2,280
Total securities available-for-sale	2,238	2,280
Mortgage banking derivative	0	0
Interest rate swap derivative	0	0
Total assets	2,238	2,280
Liabilities:
Mortgage banking derivative	0	0
Interest rate swap derivative	0	0
Total liabilities	$ 0	$ 0