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Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) - $ / shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Statement of Stockholders' Equity [Abstract]    
Issuance of restricted stock, stock incentive plan, shares 5,250 5,000
Issuance of common stock, dividend investment plan, shares 3,150 7,738
Issuance of common stock, employee benefit plan, shares 0 648
Repurchase and retirement of common stock, shares 8,857 0
Dividends declared, per share $ 0.22 $ 0.2