ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY OF FINANCING RECEIVABLES - Allowances Of Loan Losses And Loans Receivable By Class Disaggregated (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses	$ 10,267	$ 8,775	$ 7,335
Balance Loans Individually Evaluated for Impairment	716	515
Balance Related to Loans Collectively Evaluated for Impairment	9,060	7,720
Net loans receivable	1,630,112	1,475,827
Individually Evaluated for Impairment	14,263	20,704
Collectively Evaluated for Impairment	1,615,849	1,455,123
Commercial and Industrial
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses	1,175	603	208
Balance Loans Individually Evaluated for Impairment	353	152
Balance Related to Loans Collectively Evaluated for Impairment	822	451
Net loans receivable	124,937	81,709
Individually Evaluated for Impairment	835	372
Collectively Evaluated for Impairment	124,102	81,337
Construction
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses	537	663	336
Balance Loans Individually Evaluated for Impairment	0	0
Balance Related to Loans Collectively Evaluated for Impairment	537	663
Net loans receivable	125,291	142,321
Individually Evaluated for Impairment	250	0
Collectively Evaluated for Impairment	125,041	142,321
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses	6,717	5,575	5,185
Balance Loans Individually Evaluated for Impairment	296	274
Balance Related to Loans Collectively Evaluated for Impairment	6,421	5,301
Net loans receivable	995,220	878,449
Individually Evaluated for Impairment	7,176	15,760
Collectively Evaluated for Impairment	988,044	862,689
Residential Real Estate
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses	1,338	1,371	1,032
Balance Loans Individually Evaluated for Impairment	67	89
Balance Related to Loans Collectively Evaluated for Impairment	1,271	1,282
Net loans receivable	382,567	370,955
Individually Evaluated for Impairment	6,002	4,572
Collectively Evaluated for Impairment	376,565	366,383
Consumer and Other
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses	9	23	26
Balance Loans Individually Evaluated for Impairment	0	0
Balance Related to Loans Collectively Evaluated for Impairment	9	23
Net loans receivable	2,097	2,393
Individually Evaluated for Impairment	0	0
Collectively Evaluated for Impairment	2,097	2,393
Unallocated
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for Loan Losses	491	540	$ 548
Net loans receivable	$ 0	$ 0

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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