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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, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) | 451,083 | 209,551 | 0
Estimated weighted average fair value of options per share at date of grant: |  |  |
Total estimated fair value of stock options granted | $ 2,648 | $ 983 |
Officers |  |  |
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) | 425,228 | 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 | $ 5.87 | $ 4.69 |
Management |  |  |
Stock options granted (number of shares): |  |  |
Stock options granted (number of shares) | 25,855 | 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 | $ 5.87 | $ 4.69 |

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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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=109197908&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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