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Derivative Instruments and Hedging Activities (Narrative) (Details) - Interest Rate Swap [Member] - USD ($) | 12 Months Ended
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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

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition The portion of gains on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 + Details
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