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Summary Of Significant Accounting Policies (Schedule Of Stock Options Granted And Related Estimated Fair Value At Date Of Grant) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) | 209,551 | 0 | 0
Estimated weighted average fair value of options per share at date of grant: |  |  |
Total estimated fair value of stock options granted | $ 983 |  |
Officers |  |  |
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) | 151,992 |  |
Estimated weighted average fair value of options per share at date of grant: |  |  |
Estimated weighted average fair value of options per share at date of grant | $ 4.69 |  |
Management |  |  |
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) | 57,559 |  |
Estimated weighted average fair value of options per share at date of grant: |  |  |
Estimated weighted average fair value of options per share at date of grant | $ 4.69 |  |

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- Definition Share based compensation arrangement by share based payment award estimated fair value of stock options granted + References No definition available. + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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