Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.40	$ 0.37
Exercise of stock options (in shares)	7,000	42,250
Purchase of treasury shares (in shares)	68,145	0