Share-Based Payments (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2013
Share-Based Payments [Abstract]
OUTSTANDING, Beginning of year, shares	669
OUTSTANDING, Beginning of year, weighted average exercise price	$ 34.86
Granted, shares	85
Granted, weighted average exercise price	$ 53.40
Exercised, shares	(155)
Exercised, weighted average exercise price	$ 30.26
Cancelled, expired or forfeited, shares	(62)
Cancelled, expired or forfeited, weighted average exercise price	$ 44.89
OUTSTANDING, Ending balance, shares	537
OUTSTANDING, Ending balance, weighted average exercise price	$ 37.98

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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

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- Definition

Weighted average price of options that were either forfeited or expired.

+ References

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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

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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No definition available.

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Weighted average price at which grantees can acquire the shares reserved for issuance on stock options awarded.

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No definition available.

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Number of share options (or share units) exercised during the current period.

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