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Consolidated Statements of Stockholders’ Equity (USD $) | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Total
--- | --- | --- | --- | --- | ---
Balance, December 31, 2009 at Dec. 31, 2009 | $ 223,101 | $ 284,100,096 | $ 17,415,158 | $ (936,424) | $ 300,801,931
Balance, December 31, 2009 (in Shares) at Dec. 31, 2009 | 22,310,110 |  |  |  |
Forfeiture of restricted shares and stock based compensation | (7) | 154,449 |  |  | 154,442
Forfeiture of restricted shares and stock based compensation (in Shares) | (667) |  |  |  |
Stock based compensation |  |  |  |  | 154,442
Stock repurchase | (12,052) | (6,268,275) |  |  | (6,280,327)
Stock repurchase (in Shares) | (1,205,229) |  |  |  | 1,205,229
Net income for the period |  |  | 11,093,191 |  | 11,093,191
Other comprehensive income (loss) |  |  |  | 481,515 | 481,515
Balance at Dec. 31, 2010 | 211,042 | 277,986,270 | 28,508,349 | (454,909) | 306,250,752
Balance (in Shares) at Dec. 31, 2010 | 21,104,214 |  |  |  |
Stock based compensation |  | 4,071 |  |  | 4,071
Stock repurchase | (5,516) | (2,228,698) |  |  | (2,234,214)
Stock repurchase (in Shares) | (551,646) |  |  |  | 551,646
Net income for the period |  |  | 8,549,791 |  | 8,549,791
Other comprehensive income (loss) |  |  |  | 527,627 | 527,627
Balance at Dec. 31, 2011 | 205,526 | 275,761,643 | 37,058,140 | 72,718 | 313,098,027
Balance (in Shares) at Dec. 31, 2011 | 20,552,568 |  |  |  |
Stock based compensation |  |  |  |  | 31,268
Issuance of restricted shares and related stock based compensation | 747 | 30,521 |  |  | 31,268
Issuance of restricted shares and related stock based compensation (in Shares) | 74,761 |  |  |  |
Net income for the period |  |  | 28,958,487 |  | 28,958,487
Other comprehensive income (loss) |  |  |  | (54,340) | (54,340)
Balance at Dec. 31, 2012 | $ 206,273 | $ 275,792,164 | $ 66,016,627 | $ 18,378 | $ 342,033,442
Balance (in Shares) at Dec. 31, 2012 | 20,627,329 |  |  |  |

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