INVESTMENT SECURITIES - Held-to-Maturity Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value
Less Than 12 Months	$ 1,461	$ 23,438
12 Months or Greater	385,894	386,766
Total	387,355	410,204
Gross Unrealized Losses
Less Than 12 Months	(78)	(2,121)
12 Months or Greater	(43,733)	(52,505)
Total	(43,811)	(54,626)
U.S. treasury securities
Fair Value
Less Than 12 Months	0	0
12 Months or Greater	90,094	87,466
Total	90,094	87,466
Gross Unrealized Losses
Less Than 12 Months	0	0
12 Months or Greater	(3,212)	(4,149)
Total	(3,212)	(4,149)
U.S. agency securities
Fair Value
Less Than 12 Months	0	0
12 Months or Greater	14,858	14,571
Total	14,858	14,571
Gross Unrealized Losses
Less Than 12 Months	0	0
12 Months or Greater	(1,424)	(1,838)
Total	(1,424)	(1,838)
State, county and municipal securities
Fair Value
Less Than 12 Months	1,461	9,858
12 Months or Greater	103,500	105,734
Total	104,961	115,592
Gross Unrealized Losses
Less Than 12 Months	(78)	(1,392)
12 Months or Greater	(13,781)	(18,126)
Total	(13,859)	(19,518)
Mortgage-backed securities
Fair Value
Less Than 12 Months	0	13,580
12 Months or Greater	177,442	178,995
Total	177,442	192,575
Gross Unrealized Losses
Less Than 12 Months	0	(729)
12 Months or Greater	(25,316)	(28,392)
Total	$ (25,316)	$ (29,121)