Consolidated Statements of Shareholders' Equity (unaudited) (Parenthetical) - $ / shares	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Common stock, dividends per share	$ 0.26	$ 0.22
Stock Issued During Period, Shares, Employee Stock Ownership Plan	10,147	19,711
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	200	2,000
Common stock issuances from reinvested dividends, number of shares	4,838	3,133
Stock Issued During Period, Shares, Acquisitions	0	1,537,912