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Commitments and Contingencies SBA Recourse Reserve Rollforward (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]      
Beginning balance $ 1,750,000 $ 0 $ 0
SBA Recourse Provision 6,000 $ 0 2,068,000
SBA Loan Charge Offs, Net (91,000)   (318,000)
Ending balance $ 1,665,000   $ 1,750,000