LOANS - Composition of Net Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 1,514,752	$ 1,475,827
Unearned net loan origination fees	(1,107)	(1,052)
Allowance for loan losses	(9,190)	(8,775)
Net loans receivable	1,504,455	1,466,000
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	93,567	81,709
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	120,340	142,321
Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	929,091	878,449
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	369,100	370,955
Consumer and Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total loans receivable	$ 2,654	$ 2,393