SECURITIES - Investment Securities Available for Sale in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value
Less than 12 months	$ 49,280	$ 137,597
12 months or longer	544,866	468,381
Total	594,146	605,978
Unrealized Losses
Less than 12 months	4,205	9,999
12 months or longer	91,848	86,767
Total	96,053	96,766
U.S. Treasury notes and bonds
Fair Value
Less than 12 months	1,920	1,011
12 months or longer	54,277	54,563
Total	56,197	55,574
Unrealized Losses
Less than 12 months	19	30
12 months or longer	5,940	6,195
Total	5,959	6,225
Mortgage-backed securities, residential
Fair Value
Less than 12 months	6,705	79,891
12 months or longer	410,660	355,240
Total	417,365	435,131
Unrealized Losses
Less than 12 months	616	7,621
12 months or longer	80,014	76,086
Total	80,630	83,707
Obligations of states and political subdivisions
Fair Value
Less than 12 months	25,467	37,847
12 months or longer	13,006	0
Total	38,473	37,847
Unrealized Losses
Less than 12 months	485	938
12 months or longer	500	0
Total	985	938
Corporate bonds and notes
Fair Value
Less than 12 months	6,939	4,515
12 months or longer	12,932	7,455
Total	19,871	11,970
Unrealized Losses
Less than 12 months	3,061	485
12 months or longer	2,818	3,295
Total	5,879	3,780
SBA loan pools
Fair Value
Less than 12 months	8,249	14,333
12 months or longer	53,991	51,123
Total	62,240	65,456
Unrealized Losses
Less than 12 months	24	925
12 months or longer	2,576	1,191
Total	$ 2,600	$ 2,116