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Intangible Assets (Detail Textuals) - Mortgage Service Rights - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Dec. 31, 2014
Mortgage Servicing Rights          
Mortgage loans serviced for others $ 311,800,000 $ 315,300,000 $ 311,800,000 $ 315,300,000 $ 313,900,000
Mortgage loan servicing fees reported as other non-interest income $ 206,000 $ 226,000 $ 648,000 $ 672,000