Derivative Instruments and Hedging Activities (Narrative) (Details) - Interest Rate Swap [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2016
Derivative [Line Items]
Agreement related to the outstanding trust preferred capital notes, date	Dec. 04, 2008
Agreement effective, date	Dec. 01, 2008
Notional amount of derivatives	$ 7,000,000.0
Agreement expiration date	Dec. 01, 2016
Fixed interest rate of derivative	2.85%
Cash Flow Hedging [Member]
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Income		$ 149,000