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Securities (Restricted Equity Securities) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Investments, Debt and Equity Securities [Abstract]    
FRB stock $ 57,486 $ 56,819
FHLB stock 17,250 17,250
Total restricted equity securities $ 74,736 $ 74,069