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Mortgage Servicing Rights - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Transfers and Servicing [Abstract]          
Prepayment speed     10.14%    
Average quarterly discount rate     10 years    
Discount rate adjustment rate     5.00%    
Origination of Mortgage Servicing Rights (MSRs) $ 131 $ 103 $ 358 $ 233  
Amortization of Mortgage Servicing Rights (MSRs)     337 327  
Servicing Asset at Fair Value, Amount 2,014 2,135 2,014 2,135 $ 2,088
Residential mortgage loans serviced for others, principal $ 218,624 $ 210,755 $ 218,624 $ 210,755 $ 214,086