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SECURITIES (Available-for-Sale Securities, Gross Gains and Losses on Sale) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Gain (Loss) on Securities [Line Items]        
Debt Securities, Available-for-sale, Realized Gain $ 140 $ 557 $ 766 $ 729
Debt Securities, Available-for-sale, Realized Loss 22 432 132 433
Debt Securities, Available-for-sale, Realized Gain (Loss) $ 118 $ 125 $ 634 $ 296