Consolidated Condensed Statements Of Changes In Stockholders' Equity (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Statement of Stockholders' Equity [Abstract]
Cash dividends on common stock per share	$ 2.15	$ 1.88
Treasury Stock, Shares, Acquired	50,000	50,000
Stock Issued During Period, Shares, Restricted Stock Award, Gross	18,800	9,674