MORTGAGE BANKING ACTIVITIES (key unobservable inputs used in determining the fair value) (Details) - $ / LoanContracts	3 Months Ended	12 Months Ended
Sep. 30, 2021	Dec. 31, 2020
Maximum [Member]
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Discount Rates	15.00%	15.00%
Annual prepayment speeds	23.82%	23.64%
Cost of Servicing (per loan)	110	110
Minimum [Member]
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]
Discount Rates	11.00%	11.00%
Annual prepayment speeds	13.53%	13.08%
Cost of Servicing (per loan)	90	90

Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Cost of Servicing per loan.

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- Definition

Discount rate used to estimate the fair value of servicing assets and servicing liabilities.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 2
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122596-111746

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- Definition

Estimated rate of prepayments of principal on servicing assets and servicing liabilities.

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