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Stock-Based Compensation (Summary Of Stock Option And Restricted Stock Awards Activity) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015
Stock Options [Member] |  |
Number of Outstanding |  |
Outstanding at beginning | 229,435 | 240,308
Granted/Awarded |  | 83,513
Exercised/Released | (56,726) | (55,642)
Forfeited | (14,874) | (38,744)
Outstanding at ending | 157,835 | 229,435
Weighted Average Exercise Price |  |
Outstanding at beginning, Weighted Average Exercise Price | $ 26.33 | $ 22.21
Granted/Awarded, Weighted Average Exercise Price |  | 33.27
Exercised/Released, Weighted Average Exercise Price | 24.15 | 21.69
Forfeited, Weighted Average Exercise Price | 27.73 | 22.37
Outstanding at ending, Weighted Average Exercise Price | $ 26.98 | $ 26.33
Aggregate Intrinsic Value |  |
Outstanding, Options, Aggregate Intrinsic Value | $ 3,212 | $ 1,860
Vested and Expected to Vest |  |
Ending vested and expected to vest, Outstanding | 156,467 | 226,219
Vested and expected to vest, Weighted Average Exercise Price | $ 27.06 | $ 26.45
Vested and expected to vest, Aggregate Intrinsic Value | $ 3,172 | $ 1,807
Exercisable, Outstanding | 60,538 | 68,104
Exercisable, Weighted Average Exercise Price | $ 24.12 | $ 21.30
Exercisable, Aggregate Intrinsic Value | $ 1,405 | $ 895
Restricted Stock Awards [Member] |  |
Number of Outstanding |  |
Outstanding at beginning |  |
Granted/Awarded | 3,460 | 2,860
Exercised/Released | (3,460) | (2,860)
Forfeited |  |
Outstanding at ending |  |
Weighted Average Exercise Price |  |
Outstanding at beginning, Weighted Average Exercise Price |  |
Granted/Awarded, Weighted Average Exercise Price | 43.28 | 34.81
Exercised/Released, Weighted Average Exercise Price | 43.28 | 34.81
Forfeited, Weighted Average Exercise Price |  |
Outstanding at ending, Weighted Average Exercise Price |  |

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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + 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)(3)-(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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