Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends declared (in dollars per share)	$ 0.44	$ 0.43
Exercise of stock options (in shares)	1,250	0
Stock Issued During Period (in shares)	440,604	0
Purchase of treasury shares (in shares)	0	229,132