Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Stockholders' Equity [Abstract]
Issuance of restricted stock, stock incentive plan, shares	14,609	14,493	13,196
Issuance of common stock, dividend investment plan, shares	14,731	13,769	23,180
Issuance of common stock, employee benefit plan, shares	4,580	5,958	3,326
Stock Repurchased During Period, Shares	39,333	52,936	89,607
Dividends declared, per share (in USD per share)	$ 0.94	$ 0.88	$ 0.82