SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)				12 Months Ended
	Mar. 04, 2022 USD ($)	Mar. 16, 2020	Jan. 01, 2020 USD ($)	Dec. 31, 2021 USD ($) Segment Family ResidentialHouse	Dec. 31, 2020 USD ($)	Mar. 09, 2022 $ / shares	Mar. 27, 2020 USD ($)
Property, Plant and Equipment [Line Items]
Number of families secured by loans of real estate | Family				4
Number of housing units secured by loans from segment | ResidentialHouse				5
Goodwill impairment				$ 0
Number of operating segments | Segment				1
Number of reportable operating segments | Segment				1
Impact of adoption of ASC 326, tax					$ 955,000
Decrease to retained earnings				$ 107,645,000	$ 113,449,000
Subsequent Event [Member]
Property, Plant and Equipment [Line Items]
Subordinated notes	$ 35,000,000
Notes, maturity date	Apr. 01, 2032
Stated annual interest rate	3.625%
Cash dividend per share | $ / shares						$ 0.22
Core Deposits [Member]
Property, Plant and Equipment [Line Items]
Core deposit amortization period				10 years
Paycheck Protection Program Loans
Property, Plant and Equipment [Line Items]
Percentage of government guaranteed loans				100.00%
Accounting Standards Update 2016-13
Property, Plant and Equipment [Line Items]
Change in Accounting Principle, Accounting Standards Update, Adoption Date				Jan. 01, 2020
Increase to allowance for credit losses			$ 4,548,000
Increase to allowance for credit losses, percent			28.10%
Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjustment [Member] | Restatement Adjustment [Member]
Property, Plant and Equipment [Line Items]
Impact of adoption of ASC 326, tax			$ 955,000
Decrease to retained earnings			$ 3,593,000
COVID-19
Property, Plant and Equipment [Line Items]
Maximum authorized amount of coronavirus aid, relief and economic security							$ 2,000,000,000,000
Description of federal fund interest rate				Due to the COVID-19 pandemic, market interest rates declined significantly, with the 10-year Treasury bond falling below 1.00% on March 3, 2020 for the first time. On March 16, 2020, the Federal Open Market Committee reduced the target federal funds rate range to 0.00% to 0.25%, at which it remains as of December 31, 2021.
COVID-19 | Minimum
Property, Plant and Equipment [Line Items]
Federal open market committee reduced target federal funds interest rate.		0.00%
COVID-19 | Maximum
Property, Plant and Equipment [Line Items]
Federal open market committee reduced target federal funds interest rate.		0.25%