LOANS AND ALLOWANCE FOR LOAN LOSSES (Loan Aging Analysis by Portfolio Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 13,304	$ 12,089
Current	3,312,737	3,082,934
Total Loans Outstanding	3,326,041	3,095,023	$ 3,100,324
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	8,558	8,156
SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
Current	218,803	0
Total Loans Outstanding	218,803	0	0
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	0	0
Residential Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	7,679	5,522
Current	1,046,654	1,064,852
Total Loans Outstanding	1,054,333	1,070,374	1,035,792
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	4,664	4,096
Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	1,847	2,531
Current	1,309,138	1,240,866
Total Loans Outstanding	1,310,985	1,243,397	1,260,639
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	432	1,122
Commercial
Financing Receivable, Past Due [Line Items]
Total Past Due	752	965
Current	410,473	420,143
Total Loans Outstanding	411,225	421,108	428,676
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	699	420
Home Equity
Financing Receivable, Past Due [Line Items]
Total Past Due	2,452	2,378
Current	288,363	310,401
Total Loans Outstanding	290,815	312,779	323,536
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	2,366	2,130
Consumer
Financing Receivable, Past Due [Line Items]
Total Past Due	125	162
Current	22,794	25,610
Total Loans Outstanding	22,919	25,772	23,665
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	5	24
HPFC Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	449	531
Current	16,512	21,062
Total Loans Outstanding	16,961	21,593	$ 28,016
Loans 90 Days Past Due and Accruing	0	0
Non-Accrual Loans	392	364
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	3,292	3,901
30-59 Days Past Due | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
30-59 Days Past Due | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	2,765	2,297
30-59 Days Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	117	267
30-59 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Past Due	4	548
30-59 Days Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Total Past Due	230	681
30-59 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Past Due	49	108
30-59 Days Past Due | HPFC Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	127	0
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	3,326	2,859
60-89 Days Past Due | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
60-89 Days Past Due | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	1,483	627
60-89 Days Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	1,509	1,720
60-89 Days Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Past Due	91	0
60-89 Days Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Total Past Due	171	238
60-89 Days Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Past Due	71	31
60-89 Days Past Due | HPFC Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	1	243
90 Days or Greater Past Due
Financing Receivable, Past Due [Line Items]
Total Past Due	6,686	5,329
90 Days or Greater Past Due | SBA PPP Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	0	0
90 Days or Greater Past Due | Residential Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	3,431	2,598
90 Days or Greater Past Due | Commercial Real Estate
Financing Receivable, Past Due [Line Items]
Total Past Due	221	544
90 Days or Greater Past Due | Commercial
Financing Receivable, Past Due [Line Items]
Total Past Due	657	417
90 Days or Greater Past Due | Home Equity
Financing Receivable, Past Due [Line Items]
Total Past Due	2,051	1,459
90 Days or Greater Past Due | Consumer
Financing Receivable, Past Due [Line Items]
Total Past Due	5	23
90 Days or Greater Past Due | HPFC Portfolio Segment
Financing Receivable, Past Due [Line Items]
Total Past Due	$ 321	$ 288