FAIR VALUE - Significant Unobservable Inputs (Details)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Fair value of MSRs at end of period	$ 1,469,000	$ 1,384,000
Significant Unobservable Inputs, Level 3
Significant Unobservable Inputs used in determination of Fair Value of Assets Classified as Level 3
Individually assessed loans	1,820,000	25,063,000
Other real estate owned	718,000	$ 883,000
Other real estate owned, Measurement Input [Extensible List]		Estimated Cost of Disposal/Market Adjustment
Fair value of MSRs at end of period	810,000
Mortgage servicing rights, measurement input		682,000
Contingent consideration	$ (3,100,000)
Significant Unobservable Inputs, 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	Fair Value of Collateral
Other real estate owned, Valuation Technique [Extensible List]	Fair Value of Collateral	Fair Value of Collateral
Significant Unobservable Inputs, 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	Estimated Cost of Disposal/Market Adjustment
Other real estate owned, Measurement Input [Extensible List]	Estimated Cost of Disposal/Market Adjustment
Significant Unobservable Inputs, 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
Significant Unobservable Inputs, 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
Significant Unobservable Inputs, 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
Significant Unobservable Inputs, 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
Significant Unobservable Inputs, 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
Significant Unobservable Inputs, 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	9.0
Other real estate owned, measurement input	31.8	11.3
Significant Unobservable Inputs, 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	6.4	9.8
Significant Unobservable Inputs, 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	2.3	1.7
Contingent consideration, measurement input	1.4
Significant Unobservable Inputs, 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	$ 3,000,000.0
Significant Unobservable Inputs, 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	78.4
Other real estate owned, measurement input	42.3	52.9
Significant Unobservable Inputs, 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	15.2	18.8
Significant Unobservable Inputs, 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	2.7	2.2
Contingent consideration, measurement input	1.7
Significant Unobservable Inputs, 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	$ 5,800,000
Significant Unobservable Inputs, 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	52.7
Other real estate owned, measurement input	33.3	34.0
Significant Unobservable Inputs, 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	14.0	17.6
Significant Unobservable Inputs, 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	2.6	2.1
Contingent consideration, measurement input	1.5
Commitments to Originate Real Estate Loans for Sale | Significant Unobservable Inputs, 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	$ 51,000	$ 14,000
Commitments to Originate Real Estate Loans for Sale | Significant Unobservable Inputs, 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 | Significant Unobservable Inputs, 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 | Significant Unobservable Inputs, 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 | Significant Unobservable Inputs, 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