SECURITIES - Schedule of Available-For-Sale Securities With Unrealized and Unrecognized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale, Fair value, less than 12 months	$ 12,970	$ 24,120
Available-for-sale, Fair value, 12 months or longer	901,770	980,148
Available-for-sale, Fair value, total	914,740	1,004,268
Available-for-sale, Gross Unrealized losses, less than 12 months	1,387	1,533
Available-for-sale, Gross Unrealized losses, 12 months or longer	93,560	120,854
Available-for-sale, Gross Unrealized losses, total	94,947	122,387
Held-to-maturity, Fair value, less than 12 months	7,297	12,139
Held-to-maturity, Fair value, 12 months or longer	432,715	463,980
Held-to-maturity, Fair value, total	440,012	476,119
Held-to-maturity, Gross Unrealized losses, less than 12 months	85	3,956
Held-to-maturity, Gross Unrealized losses, 12 months or longer	36,487	44,205
Held-to-maturity, Unrealized losses, total	36,572	48,161
U.S. Treasury
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale, Fair value, less than 12 months	0	0
Available-for-sale, Fair value, 12 months or longer	5,181	16,675
Available-for-sale, Fair value, total	5,181	16,675
Available-for-sale, Gross Unrealized losses, less than 12 months	0	0
Available-for-sale, Gross Unrealized losses, 12 months or longer	113	310
Available-for-sale, Gross Unrealized losses, total	113	310
Held-to-maturity, Fair value, less than 12 months	0	0
Held-to-maturity, Fair value, 12 months or longer	50,901	86,884
Held-to-maturity, Fair value, total	50,901	86,884
Held-to-maturity, Gross Unrealized losses, less than 12 months	0	0
Held-to-maturity, Gross Unrealized losses, 12 months or longer	1,306	2,804
Held-to-maturity, Unrealized losses, total	1,306	2,804
Obligations of U.S. government agencies and sponsored entities
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale, Fair value, less than 12 months	167	123
Available-for-sale, Fair value, 12 months or longer	98,267	104,495
Available-for-sale, Fair value, total	98,434	104,618
Available-for-sale, Gross Unrealized losses, less than 12 months	1	0
Available-for-sale, Gross Unrealized losses, 12 months or longer	10,828	14,946
Available-for-sale, Gross Unrealized losses, total	10,829	14,946
Held-to-maturity, Fair value, less than 12 months	0	747
Held-to-maturity, Fair value, 12 months or longer	31,166	31,109
Held-to-maturity, Fair value, total	31,166	31,856
Held-to-maturity, Gross Unrealized losses, less than 12 months	0	5
Held-to-maturity, Gross Unrealized losses, 12 months or longer	1,003	1,798
Held-to-maturity, Unrealized losses, total	1,003	1,803
Tax-exempt and taxable obligations of states and municipal subdivisions
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale, Fair value, less than 12 months	12,322	20,879
Available-for-sale, Fair value, 12 months or longer	368,468	389,113
Available-for-sale, Fair value, total	380,790	409,992
Available-for-sale, Gross Unrealized losses, less than 12 months	1,364	1,479
Available-for-sale, Gross Unrealized losses, 12 months or longer	38,409	46,797
Available-for-sale, Gross Unrealized losses, total	39,773	48,276
Held-to-maturity, Fair value, less than 12 months	7,297	10,472
Held-to-maturity, Fair value, 12 months or longer	101,870	91,480
Held-to-maturity, Fair value, total	109,167	101,952
Held-to-maturity, Gross Unrealized losses, less than 12 months	85	3,949
Held-to-maturity, Gross Unrealized losses, 12 months or longer	11,943	10,748
Held-to-maturity, Unrealized losses, total	12,028	14,697
Mortgage-backed securities - residential
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale, Fair value, less than 12 months	15	222
Available-for-sale, Fair value, 12 months or longer	239,105	262,012
Available-for-sale, Fair value, total	239,120	262,234
Available-for-sale, Gross Unrealized losses, less than 12 months	0	2
Available-for-sale, Gross Unrealized losses, 12 months or longer	26,419	34,428
Available-for-sale, Gross Unrealized losses, total	26,419	34,430
Held-to-maturity, Fair value, less than 12 months	0	0
Held-to-maturity, Fair value, 12 months or longer	119,868	127,336
Held-to-maturity, Fair value, total	119,868	127,336
Held-to-maturity, Gross Unrealized losses, less than 12 months	0	0
Held-to-maturity, Gross Unrealized losses, 12 months or longer	11,177	14,237
Held-to-maturity, Unrealized losses, total	11,177	14,237
Mortgage-backed securities - commercial
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale, Fair value, less than 12 months	466	2,896
Available-for-sale, Fair value, 12 months or longer	157,632	170,256
Available-for-sale, Fair value, total	158,098	173,152
Available-for-sale, Gross Unrealized losses, less than 12 months	22	52
Available-for-sale, Gross Unrealized losses, 12 months or longer	15,355	20,623
Available-for-sale, Gross Unrealized losses, total	15,377	20,675
Held-to-maturity, Fair value, less than 12 months	0	920
Held-to-maturity, Fair value, 12 months or longer	120,560	119,457
Held-to-maturity, Fair value, total	120,560	120,377
Held-to-maturity, Gross Unrealized losses, less than 12 months	0	2
Held-to-maturity, Gross Unrealized losses, 12 months or longer	9,408	12,332
Held-to-maturity, Unrealized losses, total	9,408	12,334
Corporate obligations
Debt and Equity Securities, FV-NI [Line Items]
Available-for-sale, Fair value, less than 12 months	0	0
Available-for-sale, Fair value, 12 months or longer	33,117	37,597
Available-for-sale, Fair value, total	33,117	37,597
Available-for-sale, Gross Unrealized losses, less than 12 months	0	0
Available-for-sale, Gross Unrealized losses, 12 months or longer	2,436	3,750
Available-for-sale, Gross Unrealized losses, total	2,436	3,750
Held-to-maturity, Fair value, less than 12 months	0	0
Held-to-maturity, Fair value, 12 months or longer	8,350	7,714
Held-to-maturity, Fair value, total	8,350	7,714
Held-to-maturity, Gross Unrealized losses, less than 12 months	0	0
Held-to-maturity, Gross Unrealized losses, 12 months or longer	1,650	2,286
Held-to-maturity, Unrealized losses, total	$ 1,650	$ 2,286