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CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $) In Thousands, except Share data | Total | COMMON STOCK [Member] | CAPITAL SURPLUS [Member] | RETAINED EARNINGS [Member] | ACCUMULATED OTHER COMPREHENSIVE INCOME [Member]
--- | --- | --- | --- | --- | ---
Balance at beginning of period at Dec. 31, 2010 |  | $ 15,369 | $ 73,040 | $ 361,680 | $ 8,505
Issued at beginning of period, Shares at Dec. 31, 2010 |  | 15,368,717 |  |  |
Net income | 45,621 |  |  | 45,621 |
Net change | 939 |  |  |  | 939
Common stock issued |  | 51 | 990 |  |
Dividends on common stock ($1.20, $1.12 and $1.04 per share, respectively) |  |  |  | (15,787) |
Shares issued, Shares |  | 50,862 |  |  |
Tax effect of stock options |  |  | 357 |  |
Stock-based compensation arrangements |  |  | 3,075 |  |
Common stock acquired and canceled |  | (302) |  | (10,497) |
Shares acquired and canceled, Shares |  | (302,149) |  |  |
Balance at end of period at Dec. 31, 2011 | 483,041 | 15,118 | 77,462 | 381,017 | 9,444
Issued at end of period, Shares at Dec. 31, 2011 |  | 15,117,430 |  |  |
Net income | 51,900 |  |  | 51,900 |
Net change | (3,127) |  |  |  | (3,127)
Common stock issued |  | 131 | 2,139 |  |
Dividends on common stock ($1.20, $1.12 and $1.04 per share, respectively) |  |  |  | (17,061) |
Shares issued, Shares |  | 131,665 |  |  |
Tax effect of stock options |  |  | 1,270 |  |
Stock-based compensation arrangements |  |  | 1,530 |  |
Common stock acquired and canceled |  | (7) |  | (249) |
Shares acquired and canceled, Shares |  | (6,787) |  |  |
Balance at end of period at Dec. 31, 2012 | 519,567 | 15,242 | 82,401 | 415,607 | 6,317
Issued at end of period, Shares at Dec. 31, 2012 |  | 15,242,308 |  |  |
Net income | 54,317 |  |  | 54,317 |
Net change | (2,410) |  |  |  | (2,410)
Common stock issued |  | 158 | 3,590 |  |
Dividends on common stock ($1.20, $1.12 and $1.04 per share, respectively) |  |  |  | (18,327) |
Shares issued, Shares |  | 157,155 |  |  |
Tax effect of stock options |  |  | 1,452 |  |
Stock-based compensation arrangements |  |  | 1,360 |  |
Common stock acquired and canceled |  | (66) |  | (2,644) |
Shares acquired and canceled, Shares |  | (65,841) |  |  |
Balance at end of period at Dec. 31, 2013 | $ 556,997 | $ 15,334 | $ 88,803 | $ 448,953 | $ 3,907
Issued at end of period, Shares at Dec. 31, 2013 |  | 15,333,622 |  |  |

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