Stock-Based Compensation Plans (Schedule Of Fair Value Assumptions) (Details) (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Stock-Based Compensation Plans [Abstract]
Risk free interest rate	1.55%	1.13%	2.04%
Expected market volatility factor for the Company's stock	26.44%	26.08%	26.28%
Dividend yield	3.39%	3.40%	3.79%
Expected life of the options (years)	7 years	6 years 10 months 24 days	6 years 9 months 18 days
Options granted	27,000	37,500	30,500
Estimated fair value of options granted	$ 6.63	$ 5.85	$ 4.99

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Section D

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Net number of share options (or share units) granted during the period.

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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.

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