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Investment Securities (Security Sales) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Investments, Debt and Equity Securities [Abstract]      
Proceeds from sales of debt securities $ 0 $ 20,000  
Proceeds from sales of debt securities 0 22,210 $ 0
Proceeds from sales of marketable and restricted equity securities 1,212 2,700 11,393
Gross gains from sales 0 1,472 11,612
Gross losses from sales (232) (68) (219)
Gain on sales of securities, net $ (232) $ 1,404 $ 11,393