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BORROWINGS (Securities Sold with Agreements to Repurchase) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Short-term Debt [Abstract]      
Outstanding at year end $ 0 $ 75,555 $ 70,652
Approximate average interest rate at year end 0.00% 0.74% 0.46%
Highest amount outstanding as of any month end during the year $ 72,814 $ 106,239 $ 77,886
Approximate average outstanding during the year $ 15,104 $ 86,874 $ 63,379
Approximate average interest rate during the year 0.86% 0.58% 0.39%