FAIR VALUE - Significant unobservable inputs (Details) $ in Thousands	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
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
Other real estate owned, measurement input	0.090
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
Other real estate owned, measurement input	0.738
Level 3
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Other real estate owned		$ 503
Other real estate owned, measurement input [Extensible List]		Estimated cost of disposal/market adjustment
Mortgage servicing rights	$ 162
Mortgage servicing rights, measurement input		1,169
Contingent consideration	$ (5,150)	$ (2,800)
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	$ 3,014
Individually assessed loans, measurement input	27.2
Individually assessed loans, Measurement Input [Extensible List]	Estimated cost of disposal/market adjustment
Other real estate owned	$ 1,159
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	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 of achievement
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Contingent consideration, Measurement Input [Extensible List]	Probability of achievement	Probability of achievement
Level 3 | Minimum | Probability of achievement
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Business Combination, Contingent Consideration Liability Measurement Input2	$ 100,000
Contingent consideration, measurement input 2	$ 100,000
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
Other real estate owned, measurement input	9.0	9.0
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	4.2	2.9
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	4.6
Contingent consideration, measurement input	6.7	5.9
Level 3 | Minimum | Discounted cash flow | Probability of achievement
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Contingent consideration, measurement input		44.9
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
Other real estate owned, measurement input	73.8	72.8
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	5.1	3.3
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	5.0	4.9
Contingent consideration, measurement input	6.9	6.2
Level 3 | Maximum | Discounted cash flow | Probability of achievement
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Contingent consideration, measurement input		53.5
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
Other real estate owned, measurement input	(45.8)	(35.7)
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	(4.2)	(2.9)
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)	(4.9)
Contingent consideration, measurement input	(6.9)	(6.1)
Level 3 | Weighted Average | Discounted cash flow | Probability of achievement
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Contingent consideration, measurement input	(50.1)
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	$ 2	$ 5
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