Shareholders' Equity (Stock Options Activity Roll Forward) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Stock Options [Member]
Options, Outstanding at beginning of period	37,996
Options, Granted	276
Options, Exercised	(8,525)
Options, Forfeited or expired	(1,030)
Options, Outstanding at end of period	28,717
Number of options exercisable	25,386
Options, Exercisable and expected to vest at period end	28,478
Wtd. Avg. Exercise Price [Member]
Wtd. Avg. Exercise Price, Outstanding at beginning of period	$ 34.90
Wtd. Avg. Exercise Price, Granted	$ 37.55
Wtd. Avg. Exercise Price, Exercised	$ 34.13
Wtd. Avg. Exercise Price, Forfeited or expired	$ 36.72
Wtd. Avg. Exercise Price, Outstanding at end of period	$ 35.09
Wtd. Avg. Exercise Price, Exercisable at end of period	$ 35.74
Wtd. Avg. Exercise Price, Exercisable and expected to vest at end of period	$ 35.14