COMMITMENTS AND CONTINGENCIES - Schedule of Commitments and Letters of Credit (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Commitments to extend credit
Other Commitments [Line Items]
Off-balance sheet liability	$ 368,523	$ 342,523
Letters of credit
Other Commitments [Line Items]
Off-balance sheet liability	$ 11,857	$ 11,675