LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Non-accrual loans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	$ 338	$ 4,512
Transfer into non-accrual	173	1,055
Loans paid down/payoffs	(179)	(685)
Loans return to accrual status	(29)	(650)
Loans charged off	(83)	(123)
Balance	220	4,109
Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	123
Balance	110
Commercial and Industrial
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	71
Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	144
Single-family | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	123	270
Transfer into non-accrual	31
Loans paid down/payoffs	(44)	(136)
Balance	110	134
Commercial | Real Estate Loan
Financing Receivable Nonaccrual Status [Roll Forward]
Balance		4,029
Transfer into non-accrual		920
Loans paid down/payoffs		(496)
Loans return to accrual status		(616)
Balance		3,837
Commercial | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	110
SBA Guaranty | Commercial and Industrial
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	71
Loans paid down/payoffs	(61)
Loans charged off	(10)
Consumer and Indirect | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance		34
Transfer into non-accrual	11	1
Loans paid down/payoffs	(11)	(1)
Loans return to accrual status		(34)
Automobile | Consumer Loans
Financing Receivable Nonaccrual Status [Roll Forward]
Balance	144	179
Transfer into non-accrual	131	134
Loans paid down/payoffs	(63)	(52)
Loans return to accrual status	(29)
Loans charged off	(73)	(123)
Balance	$ 110	$ 138