FAIR VALUE - Assets and liabilities measured on a non-recurring basis (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Assets and liabilities measured on non-recurring basis
Mortgage servicing rights	$ 5,107,000	$ 1,469,000
Valuation allowance	0	566,000
Fair value, assets, levels transfers	0
Mortgage servicing rights
Assets and liabilities measured on non-recurring basis
Valuation allowance	700,000
Level 3
Assets and liabilities measured on non-recurring basis
Individually assessed loans		1,820,000
Other real estate owned	503,000	718,000
Mortgage servicing rights	1,169,000
Contingent consideration	$ (2,800,000)	3,100,000
Level 3 | Other real estate owned | Market approach valuation technique | Minimum
Assets and liabilities measured on non-recurring basis
Discount rate	9.00%
Level 3 | Other real estate owned | Market approach valuation technique | Maximum
Assets and liabilities measured on non-recurring basis
Discount rate	72.80%
Non-recurring
Assets and liabilities measured on non-recurring basis
Individually assessed loans	$ 0	1,820,000
Other real estate owned	503,000	718,000
Mortgage servicing rights	1,169,000	810,000
Contingent consideration	(2,800,000)	(3,100,000)
Total	(1,128,000)	248,000
Non-recurring | Level 1
Assets and liabilities measured on non-recurring basis
Individually assessed loans	0	0
Other real estate owned	0	0
Mortgage servicing rights	0	0
Contingent consideration	0	0
Total	0	0
Non-recurring | Level 2
Assets and liabilities measured on non-recurring basis
Individually assessed loans	0	0
Other real estate owned	0	0
Mortgage servicing rights	0	0
Contingent consideration	0	0
Total	0	0
Non-recurring | Level 3
Assets and liabilities measured on non-recurring basis
Individually assessed loans	0	1,820,000
Other real estate owned	503,000	718,000
Mortgage servicing rights	1,169,000	810,000
Contingent consideration	(2,800,000)	(3,100,000)
Total	$ (1,128,000)	$ 248,000