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Derivatives and Hedging Activities (Details) - Interest Rate Swap [Member] - Designated as Hedging Instrument [Member] - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 31, 2019
Dec. 31, 2018
Other Assets [Member]        
Derivative [Line Items]        
Derivative asset       $ 76,000
Cash Flow Hedging [Member]        
Derivative [Line Items]        
Notional amount     $ 255,000,000  
Cash Flow Hedging [Member] | Interest Expense [Member]        
Derivative [Line Items]        
Amount of income (loss) recognized in OCI on derivatives (effective portion) $ 1,000 $ 494,000    
Amount of (income) loss reclassified from accumulated OCI into income (effective portion) $ (77,000) $ (248,000)