INVESTMENT SECURITIES - Available-for-Sale Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Estimated Fair Value
Less Than 12 Months	$ 14,596	$ 183,951
12 Months or More	387,424	246,349
Total	402,020	430,300
Unrealized Losses
Less Than 12 Months	(367)	(13,575)
12 Months or More	(47,603)	(44,251)
Total	(47,970)	(57,826)
U.S. treasury securities
Estimated Fair Value
Less Than 12 Months	0	1,377
12 Months or More	498	245
Total	498	1,622
Unrealized Losses
Less Than 12 Months	0	(17)
12 Months or More	(2)	(5)
Total	(2)	(22)
U.S. agency securities
Estimated Fair Value
Less Than 12 Months	0	3,221
12 Months or More	4,139	1,364
Total	4,139	4,585
Unrealized Losses
Less Than 12 Months	0	(257)
12 Months or More	(361)	(193)
Total	(361)	(450)
Asset backed securities
Estimated Fair Value
Less Than 12 Months	6,196	10,780
12 Months or More	17,424	19,208
Total	23,620	29,988
Unrealized Losses
Less Than 12 Months	(75)	(319)
12 Months or More	(330)	(1,161)
Total	(405)	(1,480)
State, county and municipal securities
Estimated Fair Value
Less Than 12 Months	1,033	29,284
12 Months or More	107,443	75,472
Total	108,476	104,756
Unrealized Losses
Less Than 12 Months	(138)	(3,629)
12 Months or More	(15,356)	(17,734)
Total	(15,494)	(21,363)
Corporate debt securities
Estimated Fair Value
Less Than 12 Months	1,446	17,258
12 Months or More	45,044	30,651
Total	46,490	47,909
Unrealized Losses
Less Than 12 Months	(105)	(1,463)
12 Months or More	(6,355)	(3,857)
Total	(6,460)	(5,320)
Mortgage-backed securities
Estimated Fair Value
Less Than 12 Months	5,921	122,031
12 Months or More	212,876	119,409
Total	218,797	241,440
Unrealized Losses
Less Than 12 Months	(49)	(7,890)
12 Months or More	(25,199)	(21,301)
Total	$ (25,248)	$ (29,191)