SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Loans and Allowance for Loan Losses (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Allowance for loan losses
Potential charge-off of loan upon principal or interest default, period one	90 days
Potential charge-off of loan upon principal or interest default, period two	120 days
Potential charge-off of loan upon principal or interest default, period three	180 days
Balance of loans individually evaluated for impairment	$ 26,983,000	$ 19,355,000
Residential real estate
Allowance for loan losses
Balance of loans individually evaluated for impairment	1,000,000
Non-residential real estate loans
Allowance for loan losses
Balance of loans individually evaluated for impairment	$ 200,000

No definition available.

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- Definition

Represents the default period one of either principal or interest of a loan to be considered a potential charge-off.

+ References

No definition available.

+ Details

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- Definition

Represents the default period three of either principal or interest of a loan to be considered a potential charge-off.

+ References

No definition available.

+ Details

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- Definition

Represents the default period two of either principal or interest of a loan to be considered a potential charge-off.

+ References

No definition available.

+ Details

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- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=118936363&loc=SL6953423-111524

+ Details

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- Details

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