SECURITIES - Unrealized Loss Analysis on Available-for-Sale and Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Schedule of Available-for-sale Securities
Less than 12 months, fair value	$ 19,656	$ 31,397
12 months or more, fair value	985,258	1,002,690
Total fair value	1,004,914	1,034,087
Less than 12 months, unrealized losses	396	440
12 Months or more, unrealized losses	154,331	174,334
Total unrealized losses	154,727	174,774
U.S. government sponsored agencies
Schedule of Available-for-sale Securities
Less than 12 months, fair value	0	0
12 months or more, fair value	116,668	119,479
Total fair value	116,668	119,479
Less than 12 months, unrealized losses	0	0
12 Months or more, unrealized losses	23,330	27,213
Total unrealized losses	23,330	27,213
Mortgage-backed securities: residential
Schedule of Available-for-sale Securities
Less than 12 months, fair value	35	52
12 months or more, fair value	418,148	442,765
Total fair value	418,183	442,817
Less than 12 months, unrealized losses	1	0
12 Months or more, unrealized losses	62,218	74,551
Total unrealized losses	62,219	74,551
State and municipal securities
Schedule of Available-for-sale Securities
Less than 12 months, fair value	19,621	31,345
12 months or more, fair value	450,442	440,446
Total fair value	470,063	471,791
Less than 12 months, unrealized losses	395	440
12 Months or more, unrealized losses	68,783	72,570
Total unrealized losses	$ 69,178	$ 73,010