LEASES - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2021 USD ($) branch	Jan. 01, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Number of retail branches | branch	3
Remaining lease term except the land lease	6 years
Remaining lease term of land lease	85 years
Operating lease, right-of-use asset	$ 2,182
Operating lease, liability	2,182
Future minimum lease payments	$ 27,145
Weighted average remaining lease term	55 years 6 months
Weighted average discount rate	7.40%
Cumulative Effect, Period of Adoption, Adjustment
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset		$ 2,800
Operating lease, liability		$ 2,800