LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Loan Aging Analysis by Portfolio Segment) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Financing Receivable, Past Due [Line Items]
Loans outstanding	$ 3,315,303	$ 3,219,822
Loans 90 Days Past Due and Accruing	0	0
Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,128,560	1,097,975
Loans 90 Days Past Due and Accruing	0	0
Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	291,117	271,495
Loans 90 Days Past Due and Accruing		0
Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	352,533	381,494
Loans 90 Days Past Due and Accruing	0	0
SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Loans outstanding	81,959	135,095
Loans 90 Days Past Due and Accruing	0	0
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,222,084	1,054,798
Loans 90 Days Past Due and Accruing	0	0
Home Equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	218,797	258,573
Loans 90 Days Past Due and Accruing	0	0
Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	20,253	20,392
Loans 90 Days Past Due and Accruing	0	0
Total Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	5,383	8,787
Total Past Due | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	52	223
Total Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	133	146
Total Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,370	1,287
Total Past Due | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
Total Past Due | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	2,454	5,044
Total Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,293	1,924
Total Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	81	163
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	2,113	2,362
30-59 Days Past Due | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
30-59 Days Past Due | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	86	99
30-59 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	557	430
30-59 Days Past Due | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
30-59 Days Past Due | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,056	1,406
30-59 Days Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	369	335
30-59 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	45	92
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	278	1,393
60-89 Days Past Due | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	50
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	0	0
60-89 Days Past Due | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
60-89 Days Past Due | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	240	1,103
60-89 Days Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	30	173
60-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	8	67
90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Loans outstanding	2,992	5,032
90 Days or Greater Past Due | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	52	173
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	813	857
90 Days or Greater Past Due | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Loans outstanding	0	0
90 Days or Greater Past Due | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,158	2,535
90 Days or Greater Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	894	1,416
90 Days or Greater Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	28	4
Current
Financing Receivable, Past Due [Line Items]
Loans outstanding	3,309,920	3,211,035
Current | Commercial real estate - non owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,128,508	1,097,752
Current | Commercial real estate - owner-occupied
Financing Receivable, Past Due [Line Items]
Loans outstanding	290,984	271,349
Current | Commercial
Financing Receivable, Past Due [Line Items]
Loans outstanding	351,163	380,207
Current | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Loans outstanding	81,959	135,095
Current | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Loans outstanding	1,219,630	1,049,754
Current | Home Equity
Financing Receivable, Past Due [Line Items]
Loans outstanding	217,504	256,649
Current | Consumer
Financing Receivable, Past Due [Line Items]
Loans outstanding	$ 20,172	$ 20,229