Stock-Based Compensation (Summary Of Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stock-Based Compensation [Abstract]
Number of Options, Outstanding, Beginning balance			3,084
Number of Options, Granted	0	0	378	348
Number of Options, Exercised			(612)
Number of Options, Forfeited or expired			(63)
Number of Options, Outstanding, Ending balance	2,787		2,787
Number of Options, Exercisable at September 30, 2014	1,958		1,958
Weighted-Average Exercise Price, Outstanding, Beginning balance			$ 19.79
Weighted-Average Exercise Price, Granted			$ 22.94
Weighted-Average Exercise Price, Exercised			$ 19.20
Weighted-Average Exercise Price, Forfeited or expired			$ 22.59
Weighted-Average Exercise Price, Outstanding, Ending balance	$ 20.28		$ 20.28
Weighted-Average Exercise Price, Exercisable at September 30, 2014	$ 20.56		$ 20.56
Weighted-Average Remaining Contractual Term (Years), Outstanding			4 years 9 months 25 days
Weighted-Average Remaining Contractual Term (Years), Exercisable at September 30, 2014			3 years 0 months 7 days
Aggregate Intrinsic Value, Outstanding at September 30, 2014	$ 8,008		$ 8,008
Aggregate Intrinsic Value, Exercisable at September 30, 2014	$ 5,584		$ 5,584