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Intangible Assets (Detail Textuals) - Mortgage servicing rights (MSRs) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]          
Mortgage loans serviced for others $ 299,700,000 $ 311,800,000 $ 299,700,000 $ 311,800,000 $ 312,100,000
Mortgage loan servicing fees reported as other non-interest income $ 233,000 $ 206,000 $ 654,000 $ 648,000