COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Operating Leased Assets [Line Items]
Rent expense for operating leases	$ 1,000	$ 1,300	$ 2,200	$ 2,700
Sublease income	182	$ 189	374	$ 365
Cash balances held at other institutions that exceed FDIC insured limits	26,100		26,100		$ 25,700
Restricted cash	$ 15,700		$ 15,700		2,800
Operating Lease Arrangement Type One
Operating Leased Assets [Line Items]
Renewal term	3 years		3 years
Operating Lease Arrangement Type Two
Operating Leased Assets [Line Items]
Renewal term	5 years		5 years
Operating Lease Arrangement Type Three
Operating Leased Assets [Line Items]
Renewal term	10 years		10 years
Commitments to Extend Credit
Operating Leased Assets [Line Items]
Real estate loan funding commitments	$ 116,500		$ 116,500		103,200
Unfunded Loan Commitment
Operating Leased Assets [Line Items]
Reserve recorded on real estate loan funding commitments	$ 86		$ 86		$ 89