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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Preferred Stock | Common Stock [Member] | Surplus [Member] | Treasury Stock [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income [Member] | Total
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 |  | $ 12,954 | $ 195,829 | $ (8,988) | $ 41,251 | $ 1,221 | $ 242,267
Shares outstanding at Dec. 31, 2014 |  | 15,155,717 |  |  |  |  |
Net income |  |  |  |  | 19,972 |  | 19,972
Accumulated other comprehensive income (loss) |  |  |  |  |  | (1,600) | (1,600)
Issuance of restricted stock, net of forfeitures |  | $ 134 | (134) |  |  |  |
Issuance of restricted stock, net of forfeitures, shares |  | 160,457 |  |  |  |  |
Restricted stock repurchased on vesting to pay taxes |  | $ (3) | (78) |  |  |  | (81)
Restricted stock repurchased on vesting to pay taxes, shares |  | (3,776) |  |  |  |  |
Amortization of restricted stock awards/units |  |  | 1,621 |  |  |  | 1,621
Cash dividends declared on common stock |  |  |  |  | (3,100) |  | (3,100)
Common stock option expense |  |  | 219 |  |  |  | 219
Common stock options exercised and related tax benefits |  | $ 11 | 75 |  |  |  | 86
Common stock options exercised and related tax benefits, shares |  | 18,891 |  |  |  |  |
Common stock options exercised, shares used for exercise |  | 7,506 |  |  |  |  |
Common stock options, related tax benefits, shares |  | 11,385 |  |  |  |  |
Sales of shares (dividend reinvestment program) |  | $ 555 | 13,093 |  |  |  | 13,648
Sales of shares (dividend reinvestment program), shares |  | 665,654 |  |  |  |  |
Issuance of shares for Employee Stock Purchase Plan |  | $ 26 | 618 |  |  |  | 644
Issuance of shares for Employee Stock Purchase Plan, shares |  | 30,766 |  |  |  |  |
Issuance of common stock for acquisition |  | $ 40 | 960 |  |  |  | 1,000
Issuance of common stock for acquisition, shares |  | 47,916 |  |  |  |  |
Issuance of warrants |  |  | 1,000 |  |  |  | 1,000
Balance at Dec. 31, 2015 |  | $ 13,717 | 213,203 | (8,988) | 58,123 | (379) | 275,676
Shares outstanding at Dec. 31, 2015 |  | 16,068,119 |  |  |  |  |
Net income |  |  |  |  | 26,477 |  | 26,477
Accumulated other comprehensive income (loss) |  |  |  |  |  | (1,152) | (1,152)
Issuance of restricted stock, net of forfeitures |  | $ (10) | 10 |  |  |  |
Issuance of restricted stock, net of forfeitures, shares |  | (12,133) |  |  |  |  |
Restricted stock repurchased on vesting to pay taxes |  | $ (24) | (530) |  |  |  | (554)
Restricted stock repurchased on vesting to pay taxes, shares |  | (29,088) |  |  |  |  |
Amortization of restricted stock awards/units |  |  | 2,836 |  |  |  | 2,836
Cash dividends declared on common stock |  |  |  |  | (3,296) |  | (3,296)
Common stock option expense |  |  | 56 |  |  |  | 56
Common stock options exercised and related tax benefits |  | $ 59 | 1,010 |  |  |  | 1,069
Common stock options exercised and related tax benefits, shares |  | 70,632 |  |  |  |  |
Common stock options exercised, shares used for exercise |  | 9,723 |  |  |  |  |
Common stock options, related tax benefits, shares |  | 60,909 |  |  |  |  |
Sales of shares (dividend reinvestment program) |  | $ 948 | 21,513 |  |  |  | 22,461
Sales of shares (dividend reinvestment program), shares |  | 1,137,998 |  |  |  |  |
Issuance of shares for Employee Stock Purchase Plan |  | $ 27 | 610 |  |  |  | 637
Issuance of shares for Employee Stock Purchase Plan, shares |  | 32,190 |  |  |  |  |
Balance at Dec. 31, 2016 |  | $ 14,717 | 238,708 | (8,988) | 81,304 | (1,531) | 324,210
Shares outstanding at Dec. 31, 2016 |  | 17,257,995 |  |  |  |  |
Net income |  |  |  |  | 36,497 |  | 36,497
Accumulated other comprehensive income (loss) |  |  |  |  |  | 534 | 534
Restricted stock units issued |  | $ 62 | (62) |  |  |  |
Restricted stock units issued, shares |  | 74,936 |  |  |  |  |
Restricted stock awards forfeitures |  | $ (1) | 1 |  |  |  |
Restricted stock awards forfeitures, shares |  | (479) |  |  |  |  |
Restricted stock repurchased on vesting to pay taxes |  | $ (49) | (1,777) |  |  |  | (1,826)
Restricted stock repurchased on vesting to pay taxes, shares |  | (58,598) |  |  |  |  |
Amortization of restricted stock awards/units |  |  | 3,741 |  |  |  | 3,741
Cash dividends declared on common stock |  |  |  |  | (3,548) |  | (3,548)
Common stock option expense |  |  | 6 |  |  |  | 6
Common stock options exercised and related tax benefits |  | $ 42 | $ 648 |  |  |  | $ 690
Common stock options exercised and related tax benefits, shares |  | 50,473 |  |  |  |  | 50,473
Common stock options exercised, shares used for exercise |  | 8,764 |  |  |  |  |
Common stock options, related tax benefits, shares |  | 41,709 |  |  |  |  |
Sales of shares (dividend reinvestment program) |  | $ 1,004 | $ 35,584 |  |  |  | $ 36,588
Sales of shares (dividend reinvestment program), shares |  | 1,204,710 |  |  |  |  |
Issuance of shares for Employee Stock Purchase Plan |  | $ 21 | 776 |  |  |  | 797
Issuance of shares for Employee Stock Purchase Plan, shares |  | 25,404 |  |  |  |  |
Issuance of shares for Employees Savings and Investment plan |  | $ 25 | 864 |  |  |  | 889
Issuance of shares for Employees Savings and Investment plan, shares |  | 30,123 |  |  |  |  |
Issuance of stock offering net of costs |  |  | 3,600 |  |  |  | 3,600
Issuance of common stock for acquisition |  | $ 37 | 1,463 |  |  |  | 1,500
Issuance of common stock for acquisition, shares |  | 43,834 |  |  |  |  |
Reclassification of certain deferred tax effects |  |  |  |  | 215 | (215) |
Balance at Dec. 31, 2017 |  | $ 15,858 | $ 283,552 | $ (8,988) | $ 114,468 | $ (1,212) | $ 403,678
Shares outstanding at Dec. 31, 2017 |  | 18,619,634 |  |  |  |  |

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