LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Loan Aging Analysis by Portfolio Segment) (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans outstanding	$ 4,073,108	$ 4,010,353
Loans 90 Days Past Due and Accruing	0	0
Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,328,793	1,292,443
Loans 90 Days Past Due and Accruing	0	0
Gross loans	1,328,793	1,292,443
Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	337,824	332,494
Loans 90 Days Past Due and Accruing		0
Gross loans	337,824	332,494
Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	421,099	430,131
Loans 90 Days Past Due and Accruing	0	0
Gross loans	421,099	430,131
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,733,147	1,700,266
Loans 90 Days Past Due and Accruing	0	0
Gross loans	1,733,147	1,700,266
Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	232,512	234,428
Loans 90 Days Past Due and Accruing	0	0
Gross loans	232,512	234,428
Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	19,733	20,591
Loans 90 Days Past Due and Accruing	0	0
Gross loans	19,733	20,591
Total Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	3,483	3,945
Total Past Due | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	44	278
Total Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	124	102
Total Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,509	1,441
Total Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	936	1,562
Total Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	809	528
Total Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	61	34
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,943	2,221
30-59 Days Past Due | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	34	267
30-59 Days Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	77	55
30-59 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	965	667
30-59 Days Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	283	852
30-59 Days Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	552	357
30-59 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	32	23
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	408	331
60-89 Days Past Due | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
60-89 Days Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
60-89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	79	134
60-89 Days Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	194	186
60-89 Days Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	106	0
60-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	29	11
90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,132	1,393
90 Days or Greater Past Due | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	10	11
90 Days or Greater Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	47	47
90 Days or Greater Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	465	640
90 Days or Greater Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	459	524
90 Days or Greater Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	151	171
90 Days or Greater Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
Current
Financing Receivable, Past Due [Line Items]
Loans outstanding	4,069,625	4,006,408
Current | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,328,749	1,292,165
Current | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	337,700	332,392
Current | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	419,590	428,690
Current | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,732,211	1,698,704
Current | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	231,703	233,900
Current | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	19,672	20,557
Commercial
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	14,185	73,686
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	68,796	70,162
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	66,132	32,498
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	30,580	33,848
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	31,836	23,187
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	47,297	27,958
Financing Receivable, Revolving	131,170	136,403
Financing Receivable, Revolving, Converted to Term Loan	31,103	32,389
Gross loans	421,099	430,131
Commercial | Doubtful
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Gross loans	0	0
Residential real estate
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	47,241	533,035
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	544,518	579,216
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	572,505	244,691
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	236,212	79,492
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	77,456	50,377
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	254,868	213,115
Financing Receivable, Revolving	347	340
Financing Receivable, Revolving, Converted to Term Loan	0	0
Gross loans	1,733,147	1,700,266
Residential real estate | Doubtful
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Gross loans	0	0
Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	32,495	339,171
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	349,083	288,043
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	292,748	162,291
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	160,495	125,491
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	123,600	116,696
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	370,372	260,751
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Gross loans	1,328,793	1,292,443
Commercial real estate - non-owner-occupied | Doubtful
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	0	0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0	0
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Gross loans	$ 0	$ 0