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Intangible Assets (Details 1) - Mortgage servicing rights (MSRs)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Assumptions used in estimating the fair value of mortgage service rights    
Weighted average constant prepayment rate (as a percent) 10.30% 11.19%
Weighted average note rate (as a percent) 3.91% 3.94%
Weighted average discount rate (as a percent) 9.19% 9.26%
Weighted average expected life (in years) 5 years 8 months 12 days 5 years 4 months 24 days