Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement Of Stockholders Equity [Abstract]
Shares exchanged with Peoples Southern Bank shareholders, Shares	222,360
Exercise of stock options and warrants, shares	28,450	25,096
Issuance of common stock, Shares	327,362	4,204
Purchase of treasury stock	5,544	25,056
Sale of treasury stock	17,218	12,967
Dividends declared, per share	$ 0.27	$ 0.25