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MORTGAGE BANKING ACTIVITIES (Unpaid principal balance of residential mortgage loans) (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Other assets $ 105,290 $ 101,370
Other liabilities 109,487 102,076
Loans held for sale, at fair value 82,081 114,039
Residential Mortgage [Member]    
Loans held-for-sale 79,903 109,831
Loans held for sale, at fair value 82,081 114,039
Fair value 86,419 117,957
Residential Mortgage [Member] | Loan Commitments (IRLCs) [Member]    
Other assets 144,155 147,494
Other assets fair value 2,982 4,825
Residential Mortgage [Member] | Forward Sales Contracts [Member]    
Other liabilities 137,500 158,500
Other assets fair value $ 1,356  
Other liabilities at fair value   $ (907)