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Mortgage Banking and Servicing Rights (Details Textual) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Mortgage Banking and Servicing Rights (Textual)    
Unpaid principal balance of mortgage loans $ 899.7 $ 772.5
Contractually specified servicing fees $ 2.1 $ 1.8