Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Consolidated Statements of Stockholders' Equity [Abstract]
Restricted stock compensation, shares		18,079
Exercise of stock options, shares	6,623
Cash dividends- common stock per share	$ 0.07	$ 0.07
Sale of treasury shares to 401(k), shares	2,960	2,040
Sale of treasury shares to deferred compensation plan, Shares	1,303	1,014