Stock-Based Compensation (Schedule Of Stock Option Plans Activity) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Shares
Options outstanding at beginning of year, shares	995	1,305	1,371
Options granted	0	83	76
Options exercised	(561)	(277)	(82)
Options forfeited and expired	(9)	(116)	(60)
Options outstanding at end of year, shares	425	995	1,305
Options exercisable at end of year	343	814	1,106
Options granted during the year, price per share	$ 0.00	$ 66.14	$ 57.34
Options exercised during the year, price per share	$ 77.70
Options outstanding at the end of year, price per share	$ 71.50	$ 74.87
Options exercisable at end of year, price per share	$ 73.60
Minimum [Member]
Shares
Options exercised during the year, price per share	$ 28.37	$ 28.37	$ 28.37
Options forfeited and expired during the year, price per share	$ 48.50	$ 46.80	$ 28.37
Options outstanding at the end of year, price per share	$ 28.37	$ 28.37	$ 28.37
Options exercisable at end of year, price per share	$ 28.37	$ 28.37	$ 28.37
Maximum [Member]
Shares
Options exercised during the year, price per share	$ 93.65	$ 88.33	$ 63.14
Options forfeited and expired during the year, price per share	$ 88.33	$ 93.65	$ 93.65
Options outstanding at the end of year, price per share	$ 93.65	$ 93.65	$ 93.65
Options exercisable at end of year, price per share	$ 93.65	$ 93.65	$ 93.65