Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.43	$ 0.42
Exercise of stock options (in shares)	0	28,500
Stock Issued During Period, Shares, Other	0	0
Purchase of treasury shares (in shares)	229,132	0