Stock-Based Compensation (Summary Of SAR Activity) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Jun. 30, 2014
Stock Appreciation Rights [Roll Forward]
Outstanding, Shares, Beginning Balance	1,758,254
Granted, Shares	173,014
Forfeited, Shares	(2,098)
Expired, Shares	(132)
Exercised, Shares	(55,430)
Outstanding, Shares, Ending Balance	1,873,608
Outstanding, Weighted Average Exercise Price, Beginning Balance	$ 34.68
Granted, Weighted Average Exercise Price	$ 44.52
Forfeited, Weighted Average Exercise Price	$ 41.87
Expired, Weighted Average Exercise Price	$ 37.16
Exercised, Weighted Average Exercise Price	$ 33.63
Outstanding, Weighted Average Exercise Price, Ending Balance	$ 35.61
Outstanding, Weighted Average Remaining Contractual Term (in years)	4 years 1 month
Outstanding, Aggregate Intrinsic Value, Ending Balance	$ 20,407