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MORTGAGE BANKING INCOME (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Revenue from External Customer [Line Items]      
Net loan servicing fees $ 25,894 $ 24,586  
Amortization of mortgage servicing rights (2,460) (1,859) $ (2,288)
Net gain on sales of residential loans 4,128 4,085 4,069
Unrealized gain (loss) on interest rate locks 63 (70) (156)
Total mortgage banking income 5,983 7,315 6,962
Bank Servicing      
Revenue from External Customer [Line Items]      
Net loan servicing fees $ 4,252 $ 5,159 $ 5,337