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Commitments and Contingencies (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]      
SBA Loans, Probability of Future Losses $ 1,700    
SBA Recourse Provision 2,068 $ 0 $ 0
Accrued credit losses for financial instruments with off-balance-sheet risk $ 0 $ 0