FAIR VALUE - Significant unobservable inputs (Details)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights	$ 5,107,000	$ 1,469,000
Level 3
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Individually assessed loans		1,820,000
Other real estate owned	503,000	$ 718,000
Other real estate owned, measurement input [Extensible List]		Estimated cost of disposal/market adjustment
Mortgage servicing rights	1,169,000
Mortgage servicing rights, measurement input		810,000
Contingent consideration	$ (2,800,000)	$ 3,100,000
Level 3 | Fair value of collateral
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Individually assessed loans, Valuation Technique [Extensible List]		Fair value of collateral
Other real estate owned, valuation technique [Extensible List]	Fair value of collateral	Fair value of collateral
Level 3 | Fair value of collateral | Estimated cost of disposal/market adjustment
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Individually assessed loans, Measurement Input [Extensible List]		Estimated cost of disposal/market adjustment
Other real estate owned, measurement input [Extensible List]	Estimated cost of disposal/market adjustment
Level 3 | Discounted Cash Flow
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, Valuation Technique [Extensible List]	Discounted Cash Flow	Discounted Cash Flow
Contingent consideration, Valuation Technique [Extensible List]	Discounted Cash Flow
Level 3 | Discounted Cash Flow | Weighted average constant prepayment rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, Measurement Input [Extensible List]	Weighted average constant prepayment rate	Weighted average constant prepayment rate
Level 3 | Discounted Cash Flow | Weighted average discount rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, Measurement Input [Extensible List]	Weighted average discount rate	Weighted average discount rate
Contingent consideration, Measurement Input [Extensible List]	Weighted average discount rate	Weighted average discount rate
Level 3 | Discounted Cash Flow | Adequate compensation
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, Measurement Input [Extensible List]	Adequate compensation	Adequate compensation
Level 3 | Discounted Cash Flow | Probability adjusted level of retained revenue
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Contingent consideration, Measurement Input [Extensible List]	Probability adjusted level of retained revenue	Probability adjusted level of retained revenue
Level 3 | Minimum | Fair value of collateral | Estimated cost of disposal/market adjustment
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Individually assessed loans, measurement input		9.0
Other real estate owned, measurement input	9.0	31.8
Level 3 | Minimum | Discounted Cash Flow | Weighted average constant prepayment rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, measurement input	2.9	6.4
Level 3 | Minimum | Discounted Cash Flow | Weighted average discount rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, measurement input	4.6	2.3
Contingent consideration, measurement input	5.9	1.4
Level 3 | Minimum | Discounted Cash Flow | Probability adjusted level of retained revenue
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Contingent consideration, measurement input 2	$ 3,100,000	$ 3,000,000
Level 3 | Maximum | Fair value of collateral | Estimated cost of disposal/market adjustment
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Individually assessed loans, measurement input		43.1
Other real estate owned, measurement input	72.8	42.3
Level 3 | Maximum | Discounted Cash Flow | Weighted average constant prepayment rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, measurement input	3.3	15.2
Level 3 | Maximum | Discounted Cash Flow | Weighted average discount rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, measurement input	4.9	2.7
Contingent consideration, measurement input	6.2	1.7
Level 3 | Maximum | Discounted Cash Flow | Probability adjusted level of retained revenue
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Contingent consideration, measurement input 2	$ 5,100,000	$ 5,800,000
Level 3 | Weighted average | Fair value of collateral | Estimated cost of disposal/market adjustment
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Individually assessed loans, measurement input		(43.1)
Other real estate owned, measurement input	(35.7)	(33.3)
Level 3 | Weighted average | Discounted Cash Flow | Weighted average constant prepayment rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, measurement input	(2.9)	(14.0)
Level 3 | Weighted average | Discounted Cash Flow | Weighted average discount rate
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Mortgage servicing rights, measurement input	(4.9)	(2.6)
Contingent consideration, measurement input	(6.1)	1.5
Commitments to originate real estate loans for sale | Level 3
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Commitments to originate real estate loans for sale	$ 5,000	$ 51,000
Commitments to originate real estate loans for sale | Level 3 | Embedded servicing value
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Commitments to originate real estate loans for sale, measurement input	1.0	1.0
Commitments to originate real estate loans for sale | Level 3 | Discounted Cash Flow
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Commitments to originate real estate loans for sale, Valuation Technique [Extensible List]	Discounted Cash Flow	Discounted Cash Flow
Commitments to originate real estate loans for sale | Level 3 | Discounted Cash Flow | Embedded servicing value
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Commitments to originate real estate loans for sale, Measurement Input [Extensible List]	Embedded servicing value	Embedded servicing value
Business loans held for sale | Level 3 | Adequate compensation
Significant unobservable inputs used in determination of fair value of assets classified as Level 3
Business loans held for sale, measurement input	7	7