FAIR VALUE MEASUREMENTS - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Fair Value Measurements Disclosure [Line Items]
Transfer of equity security to non-marketable equity securities, included in other assets	$ 0	$ 0
Collateral dependent loans, allowance for credit loss	10,900,000
Provision for fair value measurements included in allowance for loan losses	2,400,000
Fair Value, Nonrecurring
Fair Value Measurements Disclosure [Line Items]
Collateral dependent loans carrying value	25,000,000
Carrying amount of OREO	1,900,000
Valuation allowance of OREO	200,000
Loss from OREO included in earnings	200,000
Mortgage Servicing Rights | Fair Value, Nonrecurring
Fair Value Measurements Disclosure [Line Items]
Servicing asset	1,500,000
Valuation allowance for impairment of recognized servicing assets, additions (deductions) for expenses (recoveries)	200,000
Mortgage Servicing Rights | Fair Value, Nonrecurring | Provision Expense
Fair Value Measurements Disclosure [Line Items]
Valuation allowance for impairment of recognized servicing assets, deductions for recoveries	2,300,000
SBA-Guaranteed Loan Servicing | Fair Value, Nonrecurring
Fair Value Measurements Disclosure [Line Items]
Servicing asset	3,100,000
Valuation allowance for impairment of recognized servicing assets, additions (deductions) for expenses (recoveries)	1,100,000
Valuation allowance for impairment of recognized servicing assets, deductions for recoveries	$ 0