FAIR VALUE - Summary of assets measured at level 3 fair value on recurring basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned valuation allowance		$ 1,900
Impaired Financing Receivable, with Related Allowance, Recorded Investment	$ 2,192	3,421
Loans and Leases Receivable, Allowance	13,732	12,539
Other real estate owned, gross		2,100
Other real estate owned		194
Net recorded investment	2,564	1,958
Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned		194
Level 3
Summary of assets measured on a recurring and nonrecurring basis
Impaired Financing Receivable, with Related Allowance, Recorded Investment	2,200	3,400
Loans and Leases Receivable, Allowance	1,800	1,600
Provision for loan losses	1,800	1,600
Level 3 | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned		194
Commercial and Industrial | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Net recorded investment	439	1,800
Commercial and Industrial | Level 3 | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Net recorded investment	$ 439	$ 1,800