LOAN CREDIT QUALITY AND RELATED ALLOWANCE FOR LOAN LOSSES - Schedule of Concentration Risk (Details) - Owners of rental properties - Financing receivable	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Residential
Concentration Risk [Line Items]
Concentration of loans (as a percent)	19.21%	16.57%
Commercial
Concentration Risk [Line Items]
Concentration of loans (as a percent)	16.03%	13.57%

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.

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