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Derivative Financial Instruments (Details) - Non-designated hedging instruments - Client-Related - Interest rate swap contracts - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Summary of Derivative Instruments [Abstract]    
Notional Amount $ 146,884 $ 141,263
Other Assets    
Summary of Derivative Instruments [Abstract]    
Asset derivatives (other assets), fair value 1,749 907
Other Liabilities    
Summary of Derivative Instruments [Abstract]    
Liability derivatives (other liabilities), fair value $ 1,749 $ 907