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Commitments and Contingencies Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]          
SBA Loans, Probability of Future Losses $ 1,700   $ 1,700    
SBA Recourse Provision $ 774 $ 74 $ 780 $ 160 $ 2,068