Quarterly report pursuant to Section 13 or 15(d)

MORTGAGE BANKING ACTIVITIES (Summary of mortgage servicing rights) (Details)

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MORTGAGE BANKING ACTIVITIES (Summary of mortgage servicing rights) (Details) - Residential Mortgage [Member]
$ in Thousands
3 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Contracts
Dec. 31, 2020
USD ($)
Contracts
Servicing Assets at Fair Value [Line Items]    
Number of residential mortgage loans serviced for others | Contracts 2,028 1,796
Outstanding principal balance of residential mortgage loans serviced for others | $ $ 505,321 $ 456,135
Weighted average interest rate 3.62% 3.64%
Remaining contractual term (in months) 316 months 321 months