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Intangible Assets (Details 1) - Mortgage servicing rights (MSRs)
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Assumptions used in estimating the fair value of mortgage service rights    
Weighted average constant prepayment rate (as a percent) 13.20% 10.06%
Weighted average note rate (as a percent) 3.88% 3.92%
Weighted average discount rate (as a percent) 9.20% 9.35%
Weighted average expected life (in years) 4 years 9 months 18 days 5 years 9 months 18 days