Share Repurchase Program (Schedule Of Shares Repurchased) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Proceeds from (Repurchase of) Equity [Abstract]
Shares repurchased	1,987	1,873	2,637	2,022
Average price per share	$ 221.50	$ 148.21	$ 218.05	$ 148.21
Total investment	$ 440,129	$ 277,561	$ 574,932	$ 299,625