Consolidated Statements of Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Common stock, dividends per share	$ 0.11	$ 0.10
Stock Issued During Period, Shares, Employee Stock Ownership Plan	9,911	8,893
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	2,000
Common stock issuances from reinvested dividends, number of shares	1,596	1,243