Stock Compensation (Summary Of Option Activity During The Period) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Shares under option at beginning of period	13,304
Shares under option, Granted	1,253
Shares under option, Exercised	(3,376)
Shares under option, Forfeited or expired	(68)
Shares under option at end of period	11,113
Shares under option, Exercisable	6,835
Weighted-average exercise price of Shares under option at beginning of period (in dollars per share)	$ 28.31
Weighted-average exercise price of Shares under option, Granted (in dollars per share)	$ 40.65
Weighted-average exercise price of Shares under option, Exercised (in dollars per share)	$ 27.63
Weighted-average exercise price of Shares under option, Forfeited or expired (in dollars per share)	$ 27.50
Weighted-average exercise price of Shares under option at end of period (in dollars per share)	$ 29.91
Weighted-average exercise price of Shares under option, Exercisable (in dollars per share)	$ 29.01