Share-Based Compensation (Summary Of Stock Award Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Number of Shares
Number of Shares, December 31, 2013	2,483
Granted, Number of Shares	535
Cancelled, Number of Shares	(35)
Exercised, Number of Shares	(181)
Number of Shares, March 31, 2014	2,802
Weighted Average Exercise Price
Weighted Average price, December 31, 2013 (in dollars per share)	$ 16.05
Granted, Weighted Average price (in dollars per share)	$ 28.02
Cancelled, Weighted Average price (in dollars per share)	$ 21.39
Exercised, Weighted Average price (in dollars per share)	$ 14.31
Weighted Average price, March 31, 2014 (in dollars per share)	$ 18.38