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Basis of Presentation (Details)
Aug. 24, 2018
$ / shares
Sep. 30, 2019
$ / shares
Dec. 31, 2018
$ / shares
Business Acquisition [Line Items]      
Common stock, par value   $ 1 $ 1
Share exchange ratio 1    
Meridian Bank      
Business Acquisition [Line Items]      
Common stock, par value $ 1.00