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Derivative Instruments and Hedging Activity (Details 1) - USD ($)
$ in Thousands
Sep. 30, 2017
Dec. 31, 2016
Other Assets [Member]    
Derivatives designated as cash flow hedges    
Interest Rate Cash Flow Hedge Asset at Fair Value $ 1,232 $ 1,409
Other Liabilities [Member]    
Derivatives designated as cash flow hedges    
Interest Rate Cash Flow Hedge Liability at Fair Value $ 1,284 $ 1,994