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MORTGAGE BANKING ACTIVITIES - Summary of mortgage servicing rights (Details) - Residential Mortgage [Member] $ in Thousands | 12 Months Ended
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Dec. 31, 2020 USD ($) LoanContracts
Servicing Assets at Fair Value [Line Items] |
Number of Residential Mortgage Loans Serviced for Others | LoanContracts | 1,796
Outstanding Principal Balance of Residential Mortgage Loans Serviced for Others | $ | $ 456,135
Weighted Average Interest Rate | 3.64%
Remaining contractual term (in months) | 321 months

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