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FAIR VALUE - Quantitative Information (Details) - Significant Unobservable Inputs (Level 3) - Other real estate owned: - Non-recurring - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Information related to Level 3 non-recurring fair value measurement [Abstract]
Assets, fair value disclosure	$ 251	$ 143
Residential mortgages | Sales comparison
Information related to Level 3 non-recurring fair value measurement [Abstract]
Assets, fair value disclosure	$ 197	$ 143
Residential mortgages | Sales comparison | Minimum
Information related to Level 3 non-recurring fair value measurement [Abstract]
Fair value inputs, discount to appraised value	20.80%	20.80%
Residential mortgages | Sales comparison | Maximum
Information related to Level 3 non-recurring fair value measurement [Abstract]
Fair value inputs, discount to appraised value	20.80%	20.80%
Residential mortgages | Sales comparison | Weighted Average
Information related to Level 3 non-recurring fair value measurement [Abstract]
Fair value inputs, discount to appraised value	20.80%	20.80%
Home equity lines and loans | Sales comparison
Information related to Level 3 non-recurring fair value measurement [Abstract]
Assets, fair value disclosure	$ 54
Home equity lines and loans | Sales comparison | Minimum
Information related to Level 3 non-recurring fair value measurement [Abstract]
Fair value inputs, discount to appraised value	20.80%
Home equity lines and loans | Sales comparison | Maximum
Information related to Level 3 non-recurring fair value measurement [Abstract]
Fair value inputs, discount to appraised value	20.80%
Home equity lines and loans | Sales comparison | Weighted Average
Information related to Level 3 non-recurring fair value measurement [Abstract]
Fair value inputs, discount to appraised value	20.80%

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Fair Value Inputs, Discount To Appraised Value

+ References

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

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