ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Post adoption of ASC 326
Beginning balance	$ 72,606	$ 67,773	$ 61,408
Provision for credit losses	5,850	9,375	1,077
Loans charged-off	(7,332)	(5,134)	(5,983)
Recoveries	848	592	2,221
Net loans (charged-off) recovered	(6,484)	(4,542)	(3,762)
Ending balance	71,972	72,606	67,773
Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			9,050
Commercial and Industrial | Total commercial loans
Post adoption of ASC 326
Beginning balance	35,290	30,595	28,333
Provision for credit losses	1,209	8,646	1,966
Loans charged-off	(6,341)	(4,022)	(5,575)
Recoveries	180	71	1,559
Net loans (charged-off) recovered	(6,161)	(3,951)	(4,016)
Ending balance	30,338	35,290	30,595
Commercial and Industrial | Total commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			4,312
Commercial Real Estate and Multi-family Residential | Total commercial loans
Post adoption of ASC 326
Beginning balance	27,394	26,535	22,907
Provision for credit losses	3,619	1,179	(632)
Loans charged-off	0	(597)	(70)
Recoveries	322	277	14
Net loans (charged-off) recovered	322	(320)	(56)
Ending balance	31,335	27,394	26,535
Commercial Real Estate and Multi-family Residential | Total commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			4,316
Agri-business and Agricultural | Total commercial loans
Post adoption of ASC 326
Beginning balance	4,429	5,034	3,043
Provision for credit losses	(279)	(605)	611
Loans charged-off	0	0	0
Recoveries	0	0	320
Net loans (charged-off) recovered	0	0	320
Ending balance	4,150	4,429	5,034
Agri-business and Agricultural | Total commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			1,060
Other Commercial | Total commercial loans
Post adoption of ASC 326
Beginning balance	917	1,146	416
Provision for credit losses	212	(229)	(211)
Loans charged-off	0	0	0
Recoveries	0	0	0
Net loans (charged-off) recovered	0	0	0
Ending balance	1,129	917	1,146
Other Commercial | Total commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			941
Consumer 1-4 Family Mortgage | Other consumer loans
Post adoption of ASC 326
Beginning balance	3,001	2,866	2,619
Provision for credit losses	598	125	(777)
Loans charged-off	(163)	(42)	(51)
Recoveries	38	52	122
Net loans (charged-off) recovered	(125)	10	71
Ending balance	3,474	3,001	2,866
Consumer 1-4 Family Mortgage | Other consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			953
Other Consumer | Other consumer loans
Post adoption of ASC 326
Beginning balance	1,021	1,147	951
Provision for credit losses	673	155	(72)
Loans charged-off	(828)	(473)	(287)
Recoveries	308	192	206
Net loans (charged-off) recovered	(520)	(281)	(81)
Ending balance	1,174	1,021	1,147
Other Consumer | Other consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			349
Unallocated
Post adoption of ASC 326
Beginning balance	554	450	3,139
Provision for credit losses	(182)	104	192
Loans charged-off	0	0	0
Recoveries	0	0	0
Net loans (charged-off) recovered	0	0	0
Ending balance	$ 372	$ 554	450
Unallocated | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance			$ (2,881)