Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 1.26	$ 1.20
Exercise of stock options (in shares)	71,750	19,000
Stock Issued During Period, Shares, Other	61,796	0
Purchase of treasury shares (in shares)	0	456,856