ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Post adoption of ASC 326
Beginning balance	$ 67,773	$ 61,408	$ 50,652
Provision for credit losses	9,375	1,077	14,770
Loans charged-off	(5,134)	(5,983)	(5,253)
Recoveries	592	2,221	1,239
Net loans (charged-off) recovered	(4,542)	(3,762)	(4,014)
Ending balance	72,606	67,773	61,408
Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance		9,050
Ending balance			9,050
Commercial and Industrial | Total commercial loans
Post adoption of ASC 326
Beginning balance	30,595	28,333	25,789
Provision for credit losses	8,646	1,966	6,640
Loans charged-off	(4,022)	(5,575)	(4,524)
Recoveries	71	1,559	428
Net loans (charged-off) recovered	(3,951)	(4,016)	(4,096)
Ending balance	35,290	30,595	28,333
Commercial and Industrial | Total commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance		4,312
Ending balance			4,312
Commercial Real Estate and Multi-family Residential | Total commercial loans
Post adoption of ASC 326
Beginning balance	26,535	22,907	15,796
Provision for credit losses	1,179	(632)	6,868
Loans charged-off	(597)	(70)	(72)
Recoveries	277	14	315
Net loans (charged-off) recovered	(320)	(56)	243
Ending balance	27,394	26,535	22,907
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
Ending balance			4,316
Agri-business and Agricultural | Total commercial loans
Post adoption of ASC 326
Beginning balance	5,034	3,043	3,869
Provision for credit losses	(605)	611	(826)
Loans charged-off	0	0	0
Recoveries	0	320	0
Net loans (charged-off) recovered	0	320	0
Ending balance	4,429	5,034	3,043
Agri-business and Agricultural | Total commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance		1,060
Ending balance			1,060
Other Commercial | Total commercial loans
Post adoption of ASC 326
Beginning balance	1,146	416	447
Provision for credit losses	(229)	(211)	(31)
Loans charged-off	0	0	0
Recoveries	0	0	0
Net loans (charged-off) recovered	0	0	0
Ending balance	917	1,146	416
Other Commercial | Total commercial loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance		941
Ending balance			941
Consumer 1-4 Family Mortgage | Other consumer loans
Post adoption of ASC 326
Beginning balance	2,866	2,619	2,086
Provision for credit losses	125	(777)	341
Loans charged-off	(42)	(51)	(141)
Recoveries	52	122	333
Net loans (charged-off) recovered	10	71	192
Ending balance	3,001	2,866	2,619
Consumer 1-4 Family Mortgage | Other consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance		953
Ending balance			953
Other Consumer | Other consumer loans
Post adoption of ASC 326
Beginning balance	1,147	951	345
Provision for credit losses	155	(72)	959
Loans charged-off	(473)	(287)	(516)
Recoveries	192	206	163
Net loans (charged-off) recovered	(281)	(81)	(353)
Ending balance	1,021	1,147	951
Other Consumer | Other consumer loans | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance		349
Ending balance			349
Unallocated
Post adoption of ASC 326
Beginning balance	450	3,139	2,320
Provision for credit losses	104	192	819
Loans charged-off	0	0	0
Recoveries	0	0	0
Net loans (charged-off) recovered	0	0	0
Ending balance	$ 554	450	3,139
Unallocated | Cumulative Effect, Period of Adoption, Adjustment
Post adoption of ASC 326
Beginning balance		$ (2,881)
Ending balance			$ (2,881)