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SECURITIES (Available-for-Sale Securities, Gross Gains and Losses on Sale) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Gain (Loss) on Securities [Line Items]    
Available-for-sale Securities, Gross Realized Gains $ 595 $ 78
Available-for-sale Securities, Gross Realized Losses (110) 0
Available-for-sale Securities, Gross Realized Gain (Loss) $ 485 $ 78