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Servicing Assets (Narratives) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Servicing Assets At Fair Value Line Items        
Servicing Asset at Fair Value, Amount $ 9,858 $ 7,455 $ 13,992 $ 13,801
Servicing fee 3,700 4,800 6,300  
Mortgage Servicing Rights Sale Price   7,000    
Proceeds from the sale of Mortgage Servicing Rights $ 0 5,927 $ 0  
Loss on MSR Held-for-Sale   $ 2,700