LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Loan Aging Analysis by Portfolio Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Past Due [Line Items]
Loans outstanding	$ 4,100,131	$ 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	1,341,138	1,292,443
Loans 90 Days Past Due and Accruing	0	0
Gross loans	1,341,138	1,292,443
Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	335,864	332,494
Loans 90 Days Past Due and Accruing		0
Gross loans	335,864	332,494
Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	422,437	430,131
Loans 90 Days Past Due and Accruing	0	0
Gross loans	422,437	430,131
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,748,303	1,700,266
Loans 90 Days Past Due and Accruing	0	0
Gross loans	1,748,303	1,700,266
Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	232,618	234,428
Loans 90 Days Past Due and Accruing	0	0
Gross loans	232,618	234,428
Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	19,771	20,591
Loans 90 Days Past Due and Accruing	0	0
Gross loans	19,771	20,591
Total Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	4,193	3,945
Total Past Due | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	121	278
Total Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	47	102
Total Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,010	1,441
Total Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	2,126	1,562
Total Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	802	528
Total Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	87	34
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,598	2,221
30-59 Days Past Due | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	112	267
30-59 Days Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	55
30-59 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	292	667
30-59 Days Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	721	852
30-59 Days Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	396	357
30-59 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	77	23
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,321	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	260	134
60-89 Days Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	777	186
60-89 Days Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	281	0
60-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	3	11
90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,274	1,393
90 Days or Greater Past Due | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	9	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	458	640
90 Days or Greater Past Due | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	628	524
90 Days or Greater Past Due | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	125	171
90 Days or Greater Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	7	0
Current
Financing Receivable, Past Due [Line Items]
Loans outstanding	4,095,938	4,006,408
Current | Commercial real estate - non-owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,341,017	1,292,165
Current | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	335,817	332,392
Current | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	421,427	428,690
Current | Residential real estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,746,177	1,698,704
Current | Home equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	231,816	233,900
Current | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	19,684	20,557
Commercial
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	20,910	73,686
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	63,599	70,162
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	63,046	32,498
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	28,803	33,848
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	29,883	23,187
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	43,370	27,958
Financing Receivable, Revolving	128,914	136,403
Financing Receivable, Revolving, Converted to Term Loan	43,912	32,389
Gross loans	422,437	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	85,198	533,035
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	547,343	579,216
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	563,037	244,691
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	230,363	79,492
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	75,088	50,377
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	246,526	213,115
Financing Receivable, Revolving	354	340
Financing Receivable, Revolving, Converted to Term Loan	394	0
Gross loans	1,748,303	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	54,990	339,171
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	352,114	288,043
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	296,377	162,291
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	154,828	125,491
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	122,175	116,696
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	360,654	260,751
Financing Receivable, Revolving	0	0
Financing Receivable, Revolving, Converted to Term Loan	0	0
Gross loans	1,341,138	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