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Commitments and Contingencies Commitments and Contingencies (SBA Recourse Reserve) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]      
Beginning Balance $ 2,849 $ 1,750  
SBA recourse provision 1,913 2,240 $ 2,068
SBA Loan Charge Offs, Net (1,806) (1,141)  
Ending Balance $ 2,956 $ 2,849 $ 1,750