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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified | Total | Common Stock [Member] | Paid-In Capital [Member] | Accumulated Other Comprehensive Loss [Member] | Retained Earnings [Member]
--- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2012 | $ 1,126,408 | $ 674 | $ 1,036,245 | $ (3,429) | $ 92,918
Beginning Balance (in shares) at Dec. 31, 2012 |  | 67,527,386 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 128,914 |  |  |  | 128,914
Other Comprehensive Loss | (1,412) |  |  | (1,412) |
Stock Compensation | 4,619 |  | 4,619 |  |
Issuance of Common Stock in public offering, net of related expenses (in shares) |  | 9,812,500 |  |  |
Issuance of Common Stock in public offerings, net of related expenses | 357,640 | 99 | 357,541 |  |
Issuance of Restricted Stock (in shares) |  | 119,519 |  |  |
Issuance of Restricted Stock | 0 | 1 | (1) |  |
Issuance of Common Stock through exercise of options (in shares) |  | 125,000 |  |  |
Issuance of Common Stock through exercise of options | 1,400 | 1 | 1,399 |  |
Ending Balance at Sep. 30, 2013 | 1,617,569 | 775 | 1,399,803 | (4,841) | 221,832
Ending Balance (in shares) at Sep. 30, 2013 |  | 77,584,405 |  |  |
Beginning Balance at Dec. 31, 2013 | 2,050,238 | 851 | 1,813,058 | (9,781) | 246,110
Beginning Balance (in shares) at Dec. 31, 2013 | 85,177,532 | 85,177,532 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 137,330 |  |  |  | 137,330
Other Comprehensive Loss | (9,998) |  |  | (9,998) |
Stock Compensation | 11,246 |  | 11,246 |  |
Issuance of Restricted Stock (in shares) |  | 159,064 |  |  |
Issuance of Restricted Stock | 0 | 1 | (1) |  |
Issuance of Common Stock through exercise of options (in shares) | 194,908 | 194,908 |  |  |
Issuance of Common Stock through exercise of options | 654 | 2 | 652 |  |
Ending Balance at Sep. 30, 2014 | $ 2,189,470 | $ 854 | $ 1,824,955 | $ (19,779) | $ 383,440
Ending Balance (in shares) at Sep. 30, 2014 | 85,531,504 | 85,531,504 |  |  |

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