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Servicing Assets (Narratives) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Servicing Assets At Fair Value Line Items          
Servicing Asset at Fair Value, Amount $ 10,866   $ 10,866   $ 9,821
Servicing and other loan fees $ 334 $ 771 $ 1,554 $ 1,560