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Servicing Rights (Fair Value of Servicing Assets) (Details) - Term Loan - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Servicing Asset at Fair Value, Amount [Roll Forward]        
Fair value at the beginning of period $ 701 $ 1,989 $ 1,131 $ 3,489
Addition:        
Servicing resulting from transfers of financial assets 275 717 938 2,272
Changes in fair value:        
Other changes in fair value (347) (1,019) (1,440) (4,074)
Fair value at the end of period (Level 3) $ 629 $ 1,687 $ 629 $ 1,687