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Portfolio Loans - Summary of Past Due and Impaired Loans (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Receivables [Abstract]        
Total interest income that would have been recognized under original terms $ 226 $ 369 $ 703 $ 913
Total cash received and recognized as interest income on non-accrual loans 203 81 253 206
Total interest income recognized on impaired loans $ 32 $ 4 $ 63 $ 31