Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 1.11	$ 1.05
Exercise of stock options (in shares)	107,140	18,899
Purchase of treasury shares (in shares)		237,535