COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Operating Leased Assets [Line Items]
Rent expense for operating leases	$ 1,100	$ 1,300
Sublease income	191	$ 177
Cash balances held at other institutions that exceed FDIC insured limits	25,900		$ 25,700
Restricted cash	$ 18,200		2,800
Operating Lease Arrangement Type One
Operating Leased Assets [Line Items]
Renewal term	3 years
Operating Lease Arrangement Type Two
Operating Leased Assets [Line Items]
Renewal term	5 years
Operating Lease Arrangement Type Three
Operating Leased Assets [Line Items]
Renewal term	10 years
Commitments to Extend Credit
Operating Leased Assets [Line Items]
Real estate loan funding commitments	$ 123,500		103,200
Unfunded Loan Commitment
Operating Leased Assets [Line Items]
Reserve recorded on real estate loan funding commitments	$ 95		$ 89