Stock-Based Compensation (Summary Of Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013
Stock-Based Compensation [Abstract]
Number of Options, Outstanding, Beginning balance	4,240
Number of Options, Granted	348
Number of Options, Exercised	(666)
Number of Options, Forfeited or expired	(213)
Number of Options, Outstanding, Ending balance	3,709
Number of Options, Exercisable as of	2,879
Weighted-Average Exercise Price, Outstanding, Beginning balance	$ 19.88
Weighted-Average Exercise Price, Granted	$ 17.37
Weighted-Average Exercise Price, Exercised	$ 15.61
Weighted-Average Exercise Price, Forfeited or expired	$ 20.03
Weighted-Average Exercise Price, Outstanding, Ending Balance	$ 20.40
Weighted-Average Exercise Price, Exercisable, Ending Balance	$ 21.31
Weighted-Average Remaining Contractual Term (Years), Outstanding, at Period End	4 years 5 months 8 days
Weighted-Average Remaining Contractual Term (Years), Exercisable	3 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding	$ 11,883
Aggregate Intrinsic Value, Exercisable	$ 7,200