SECURITIES - Unrealized Loss Analysis on Available-for-Sale and Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities
Less than 12 months, fair value	$ 67,992	$ 455,318
12 months or more, fair value	980,616	686,704
Total fair value	1,048,608	1,142,022
Less than 12 months, unrealized losses	2,934	53,415
12 Months or more, unrealized losses	199,102	162,064
Total unrealized losses	202,036	215,479
U.S. Treasury securities
Schedule of Available-for-sale Securities
Less than 12 months, fair value	2,836	3,034
12 months or more, fair value	396	0
Total fair value	3,232	3,034
Less than 12 months, unrealized losses	17	23
12 Months or more, unrealized losses	2	0
Total unrealized losses	19	23
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Less than 12 months, fair value	0	8,420
12 months or more, fair value	122,086	118,541
Total fair value	122,086	126,961
Less than 12 months, unrealized losses	0	1,350
12 Months or more, unrealized losses	28,943	27,873
Total unrealized losses	28,943	29,223
Mortgage-backed securities: residential
Schedule of Available-for-sale Securities
Less than 12 months, fair value	23,595	165,897
12 months or more, fair value	436,450	323,727
Total fair value	460,045	489,624
Less than 12 months, unrealized losses	1,374	18,637
12 Months or more, unrealized losses	82,243	67,297
Total unrealized losses	83,617	85,934
State and municipal securities
Schedule of Available-for-sale Securities
Less than 12 months, fair value	41,561	277,967
12 months or more, fair value	421,684	244,436
Total fair value	463,245	522,403
Less than 12 months, unrealized losses	1,543	33,405
12 Months or more, unrealized losses	87,914	66,894
Total unrealized losses	$ 89,457	$ 100,299