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FAIR VALUE ACCOUNTING - Assets Measured on a Nonrecurring Basis (Details) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Assets Measured on a Nonrecurring Basis
Total	$ 8,788	$ 6,486
Quoted Prices in Active Markets for Identical Instruments (Level 1)
Assets Measured on a Nonrecurring Basis
Total	0	0
Significant Other Observable Inputs (Level 2)
Assets Measured on a Nonrecurring Basis
Total	0	0
Significant Unobservable Inputs (Level 3)
Assets Measured on a Nonrecurring Basis
Total	8,794	6,519
Foreclosed and repossessed assets, net
Assets Measured on a Nonrecurring Basis
Total	85	197
Foreclosed and repossessed assets, net | Quoted Prices in Active Markets for Identical Instruments (Level 1)
Assets Measured on a Nonrecurring Basis
Total	0	0
Foreclosed and repossessed assets, net | Significant Other Observable Inputs (Level 2)
Assets Measured on a Nonrecurring Basis
Total	0	0
Foreclosed and repossessed assets, net | Significant Unobservable Inputs (Level 3)
Assets Measured on a Nonrecurring Basis
Total	85	197
Impaired loans with allocated allowances
Assets Measured on a Nonrecurring Basis
Total	4,704	3,037
Impaired loans with allocated allowances | Quoted Prices in Active Markets for Identical Instruments (Level 1)
Assets Measured on a Nonrecurring Basis
Total	0	0
Impaired loans with allocated allowances | Significant Other Observable Inputs (Level 2)
Assets Measured on a Nonrecurring Basis
Total	0	0
Impaired loans with allocated allowances | Significant Unobservable Inputs (Level 3)
Assets Measured on a Nonrecurring Basis
Total	4,704	3,037
Mortgage servicing rights
Assets Measured on a Nonrecurring Basis
Total	3,999	3,252
Mortgage servicing rights | Quoted Prices in Active Markets for Identical Instruments (Level 1)
Assets Measured on a Nonrecurring Basis
Total	0	0
Mortgage servicing rights | Significant Other Observable Inputs (Level 2)
Assets Measured on a Nonrecurring Basis
Total	0	0
Mortgage servicing rights | Significant Unobservable Inputs (Level 3)
Assets Measured on a Nonrecurring Basis
Total	$ 4,005	$ 3,285

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- Definition

Assets fair value disclosure nonrecurring.

+ References

No definition available.

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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=117815213&loc=d3e19207-110258

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