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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Shares outstanding 19,337,662  
Common stock options exercised, shares 300  
Issuance of shares for Employee Stock Purchase Plan, shares 10,176 6,363
Shares outstanding 19,445,363  
Common Stock [Member]    
Shares outstanding 19,337,662 18,619,634
Restricted stock units issued, shares 129,362 83,659
Restricted stock awards forfeitures, shares   (92,767)
Restricted stock units/awards repurchased on vesting to pay taxes, shares (35,335) (38,512)
Cash dividends declared on common stock, per share $ 0.05 $ 0.05
Common stock options exercised, shares 300 6,150
Common stock options exercised, used to exercise, shares   1,541
Common stock options exercised, net of shares used to exercise, shares   4,609
Exercise of warrants, shares 7,109  
Exercise of warrants, used to exercise, shares 4,218  
Exercise of warrants, net of shares used to exercise, shares 2,891  
Sales of shares (Dividend Reinvestment Program), shares   317,302
Issuance of shares for Employee Stock Purchase Plan, shares 10,176 6,363
Issuance of common stock for acquisition, shares 307 20,826
Shares outstanding 19,445,363 18,921,114