Stock-Based Compensation Plans (Schedule Of Company's Stock Option Plans) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares, Options outstanding Beginning Balance	3,618
Number of Shares, Granted	1,000
Number of Shares, Exercised	(970)
Number of Shares, Canceled	(183)
Number of Shares, Options outstanding Ending Balance	3,464
Number of Shares, Options exercisable Ending Balance	1,261
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Options outstanding Beginning Balance	$ 33.92
Weighted Average Exercise Price, Granted	$ 49.61
Weighted Average Exercise Price, Exercised	$ 30.48
Weighted Average Exercise Price, Canceled	$ 39.83
Weighted Average Exercise Price, Options outstanding Ending Balance	$ 39.11
Weighted Average Exercise Price, Options exercisable Ending Balance	$ 33.90
Weighted Average Remaining Life (Years), Options outstanding	3 years 6 months 29 days
Weighted Average Remaining Life (Years), Options exercisable	2 years 5 months 1 day