FAIR VALUE DISCLOSURES - Assets and Liabilities Measured At Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets:
Total securities available-for-sale	$ 1,062,069	$ 1,185,528
Mortgage banking derivative	35,660	36,920
Liabilities:
Mortgage banking derivative	35,661	36,921
Fair Value, Measurements, Recurring
Assets:
U.S. Treasury securities	3,232	3,034
U.S. government sponsored agency securities	122,086	126,961
Mortgage-backed securities: residential	462,033	492,308
State and municipal securities	474,718	563,225
Total securities available-for-sale	1,062,069	1,185,528
Mortgage banking derivative	68	43
Interest rate swap derivative	35,660	36,920
Total assets	1,097,797	1,222,491
Liabilities:
Interest rate swap derivative	35,661	36,921
Total liabilities	35,661	36,921
Level 1 | Fair Value, Measurements, Recurring
Assets:
U.S. Treasury securities	3,232	3,034
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	3,232	3,034
Mortgage banking derivative	0	0
Interest rate swap derivative	0	0
Total assets	3,232	3,034
Liabilities:
Interest rate swap derivative	0	0
Total liabilities	0	0
Level 2 | Fair Value, Measurements, Recurring
Assets:
U.S. Treasury securities	0	0
U.S. government sponsored agency securities	122,086	126,961
Mortgage-backed securities: residential	462,033	492,308
State and municipal securities	471,701	561,150
Total securities available-for-sale	1,055,820	1,180,419
Mortgage banking derivative	68	43
Interest rate swap derivative	35,660	36,920
Total assets	1,091,548	1,217,382
Liabilities:
Interest rate swap derivative	35,661	36,921
Total liabilities	35,661	36,921
Level 3 | Fair Value, Measurements, Recurring
Assets:
U.S. Treasury securities	0	0
U.S. government sponsored agency securities	0	0
Mortgage-backed securities: residential	0	0
State and municipal securities	3,017	2,075
Total securities available-for-sale	3,017	2,075
Mortgage banking derivative	0	0
Interest rate swap derivative	0	0
Total assets	3,017	2,075
Liabilities:
Interest rate swap derivative	0	0
Total liabilities	$ 0	$ 0