Share-Based Compensation Plans (Summary Of Stock Option Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012 Y
Share-Based Compensation Plans [Abstract]
Beginning Balance, Number outstanding	2,636
Beginning Balance, Weighted-average exercise price	$ 14.89
Exercised during 2012, Number outstanding	(95)
Exercised during 2012, Weighted-average exercise price	$ 10.08
Forfeited during 2012, Number outstanding	(23)
Forfeited during 2012, Weighted-average exercise price	$ 19.96
Ending Balance, Number outstanding	2,518
Ending Balance, Weighted-average exercise price	$ 15.02
Ending Balance, Weighted-average remaining contractual term, years	2.4
Ending Balance, Aggregate intrinsic value	$ 6,660
Vested at March 31, 2012, Number outstanding	2,518
Vested at March 31, 2012, Weighted-average exercise price	$ 15.02
Vested at March 31, 2012, Weighted-average remaining contractual term, years	2.4
Vested at March 31, 2012, Aggregate intrinsic value	6,660
Exercisable at March 31, 2012, Number outstanding	2,518
Exercisable at March 31, 2012, Weighted-average exercise price	$ 15.02
Exercisable at March 31, 2012, Weighted-average remaining contractual term, years	2.4
Exercisable at March 31, 2012, Aggregate intrinsic value	$ 6,660