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Loans (Schedule of Loans Acquired with Deteriorated Credit Quality) (Details) (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 07, 2018
Aug. 01, 2018
Dec. 31, 2017
Dec. 31, 2016
Business Acquisition [Line Items]          
Less: Accretable yield $ 34,876     $ 36,565 $ 49,408
American Enterprise Bank          
Business Acquisition [Line Items]          
Contractually required payments including interest   $ 31,750      
Less: Nonaccretable difference   3,813      
Cash flows expected to be collected   27,937      
Less: Accretable yield   3,970      
Fair value of PCI loans acquired   $ 23,967      
Delaware Place Bank          
Business Acquisition [Line Items]          
Contractually required payments including interest     $ 13,385    
Less: Nonaccretable difference     1,197    
Cash flows expected to be collected     12,188    
Less: Accretable yield     2,205    
Fair value of PCI loans acquired     $ 9,983