COMMITMENTS AND CONTINGENCIES - Deposits (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2021	Dec. 31, 2020
Concentration Risk [Line Items]
Deposits	$ 1,978,238	$ 1,838,397
Deposits [Member] \| Top Ten Depositors [Member]
Concentration Risk [Line Items]
Deposits	$ 184,700	$ 170,100
Deposits [Member] \| Deposits [Member] \| Top Ten Depositors [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	9.30%	8.80%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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