LOANS (Loan Receivable and Allowance Balances Disaggregated) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Loans and Leases Receivable [Abstract]
Loans receivable	$ 1,627,620		$ 1,454,172
Allowance for loan losses:
Ending balance: individually evaluated for impairment	510		828	$ 1,476
Ending balance: collectively evaluated for impairment	18,319		10,114	9,776
Total Allowance for loan losses	18,829	$ 16,318	10,942	11,252	$ 10,918	$ 10,976
Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	23,388		27,986	28,036
Ending balance: collectively evaluated for impairment	1,471,159		1,423,762	1,384,578
Loans receivable	1,496,532		1,454,172	1,415,417
Purchased credit impaired | Portfolio Loans
Loans and Leases Receivable [Abstract]
Loans receivable	1,985		2,424	2,803
Commercial real estate
Loans and Leases Receivable [Abstract]
Loans receivable	1,021,987		964,777
Allowance for loan losses:
Ending balance: individually evaluated for impairment	468		417	444
Ending balance: collectively evaluated for impairment	12,652		6,981	6,659
Total Allowance for loan losses	13,120	11,268	7,398	7,103	7,009	6,882
Commercial real estate | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	18,148		20,707	20,974
Ending balance: collectively evaluated for impairment	1,002,258		942,332	909,638
Loans receivable	1,021,987		964,777	932,344
Commercial real estate | Purchased credit impaired | Portfolio Loans
Loans and Leases Receivable [Abstract]
Loans receivable	1,581		1,738	1,732
Residential first mortgages
Loans and Leases Receivable [Abstract]
Loans receivable	147,756		167,710
Allowance for loan losses:
Ending balance: individually evaluated for impairment				0
Ending balance: collectively evaluated for impairment	1,110		464	629
Total Allowance for loan losses	1,110	885	464	629	709	755
Residential first mortgages | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	1,739		1,917	2,089
Ending balance: collectively evaluated for impairment	146,017		165,793	161,187
Loans receivable	147,756		167,710	163,727
Residential first mortgages | Purchased credit impaired | Portfolio Loans
Loans and Leases Receivable [Abstract]
Loans receivable	0		0	451
Residential rentals
Loans and Leases Receivable [Abstract]
Loans receivable	137,950		123,601
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	1,479		397	407
Total Allowance for loan losses	1,479	1,059	397	407	458	498
Residential rentals | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	636		937	956
Ending balance: collectively evaluated for impairment	137,314		122,369	119,897
Loans receivable	137,950		123,601	121,170
Residential rentals | Purchased credit impaired | Portfolio Loans
Loans and Leases Receivable [Abstract]
Loans receivable	0		295	317
Construction and land development
Loans and Leases Receivable [Abstract]
Loans receivable	36,061		34,133
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	454		273	194
Total Allowance for loan losses	454	428	273	194	246	310
Construction and land development | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	0		0	0
Ending balance: collectively evaluated for impairment	36,061		34,133	30,774
Loans receivable	36,061		34,133	30,774
Construction and land development | Purchased credit impaired | Portfolio Loans
Loans and Leases Receivable [Abstract]
Loans receivable	0		0	0
Home equity and second mortgages
Loans and Leases Receivable [Abstract]
Loans receivable	31,427		36,098
Allowance for loan losses:
Ending balance: collectively evaluated for impairment	312		149	125
Total Allowance for loan losses	312	259	149	125	131	133
Home equity and second mortgages | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	540		510	577
Ending balance: collectively evaluated for impairment	30,483		35,197	35,302
Loans receivable	31,427		36,098	36,182
Home equity and second mortgages | Purchased credit impaired | Portfolio Loans
Loans and Leases Receivable [Abstract]
Loans receivable	404		391	303
Commercial loans
Loans and Leases Receivable [Abstract]
Loans receivable	58,894		63,102
Allowance for loan losses:
Ending balance: individually evaluated for impairment	0		210	822
Ending balance: collectively evaluated for impairment	1,079		876	779
Total Allowance for loan losses	1,079	1,161	1,086	1,601	1,402	1,482
Commercial loans | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	1,807		3,127	2,629
Ending balance: collectively evaluated for impairment	57,087		59,975	66,550
Loans receivable	58,894		63,102	69,179
Consumer loans
Loans and Leases Receivable [Abstract]
Loans receivable	1,081		1,104
Allowance for loan losses:
Ending balance: individually evaluated for impairment	0		0	0
Ending balance: collectively evaluated for impairment	20		10	8
Total Allowance for loan losses	20	15	10	8	9	6
Consumer loans | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	0		0	0
Ending balance: collectively evaluated for impairment	1,081		1,104	937
Loans receivable	1,081		1,104	937
Commercial equipment
Loans and Leases Receivable [Abstract]
Loans receivable	61,376		63,647
Allowance for loan losses:
Ending balance: individually evaluated for impairment	42		201	210
Ending balance: collectively evaluated for impairment	1,213		964	975
Total Allowance for loan losses	1,255	$ 1,243	1,165	1,185	$ 954	$ 910
Commercial equipment | Portfolio Loans
Loans and Leases Receivable [Abstract]
Ending balance: individually evaluated for impairment	518		788	811
Ending balance: collectively evaluated for impairment	60,858		62,859	60,293
Loans receivable	$ 61,376		$ 63,647	$ 61,104