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Employee Benefit Plans (Summary Of Stock Option Activity) (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |  |
Options Outstanding, beginning balance | 289,544 | 293,817 | 287,393 |
Options, Granted | 15,475 | 16,876 | 16,000 |
Options, Exercised | (126,168) | (18,899) | (9,576) |
Options, Forfeited | (5,250) | (2,250) | 0 |
Options Outstanding, ending balance | 173,601 | 289,544 | 293,817 | 287,393
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] |  |  |  |
Weighted-Average Exercise Price, Outstanding, beginning balance | $ 34.38 | $ 33.95 | $ 33.64 |
Weighted-Average Exercise Price, Granted | $ 37.74 | $ 35.39 | $ 35.09 |
Weighted-Average Exercise Price, Exercised | $ 33.57 | $ 28.78 | $ 26.63 |
Weighted-Average Exercise Price, Forfeited | $ 34.56 | $ 33.28 | $ 0.00 |
Weighted-Average Exercise Price, Outstanding, ending balance | $ 35.26 | $ 34.38 | $ 33.95 | $ 33.64
Options, Exercisable at end of year | 76,832 | 183,584 | 185,317 |
Weighted-Average Exercise Price, Exercisable at end of year | $ 37.97 | $ 34.70 | $ 33.70 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Options, Nonvested at beginning of year | 96,769 | 105,960 | 108,500 | 109,000
Options, Granted during the year | 15,475 | 16,876 | 16,000 |
Options, Vested during the year | (23,166) | (18,166) | (16,500) |
Options, Forfeited during the year | (1,500) | (1,250) | 0 |
Options, Nonvested at end of year | 96,769 | 105,960 | 108,500 | 109,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |
Weighted-Average Exercise Price, Nonvested at beginning of year | $ 33.10 | $ 33.81 | $ 34.38 | $ 35.10
Weighted-Average Exercise Price, Granted during the year | $ 37.74 | $ 35.39 | $ 35.09 |
Weighted-Average Exercise Price, Vested during the year | $ 39.64 | $ 38.87 | $ 39.34 |
Weighted-Average Exercise Price, Forfeited during the year | $ 30.38 | $ 30.38 | $ 0.00 |
Weighted-Average Exercise Price, Nonvested at end of year | $ 33.10 | $ 33.81 | $ 34.38 | $ 35.10

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- Definition 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. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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