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Intangible Assets (Details 1) - Mortgage servicing rights (MSRs)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Assumptions used in estimating the fair value of mortgage service rights    
Weighted average constant prepayment rate 8.29% 10.30%
Weighted average note rate 3.85% 3.91%
Weighted average discount rate 9.72% 9.19%
Weighted average expected life (in years) 6 years 6 months 5 years 8 months 12 days