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Derivatives (Narrative) (Details)
9 Months Ended
Sep. 30, 2018
USD ($)
agreement
Derivative [Line Items]  
Notional Amount $ 42,800,000
Payable under agreements 2,800,000
Cash collateral $ 251,000
Interest Rate Swap [Member]  
Derivative [Line Items]  
Number of interest rate swap agreements | agreement 8
Fair value adjustment on derivatives $ 1,800,000