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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive (Loss) Income
--- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2010 | $ 176,004 | $ 133 | $ 1,206 | $ 174,625 | $ 40
Beginning Balance, shares at Dec. 31, 2010 |  | 13,316,822 |  |  |
Tax shortfall associated with stock-based compensation arrangements | (569) |  | (569) |  |
Repurchase of common stock | (202,664) | (16) | (13,575) | (189,073) |
Repurchase of common stock, shares |  | (1,581,444) |  |  |
Restricted stock forfeitures and cancellations, net of grants |  | 1 | (1) |  |
Restricted stock forfeitures and cancellations, net of grants, shares |  | 57,078 |  |  |
Stock-based compensation | 13,234 |  | 13,234 |  |
Common stock dividends | (49,105) |  |  | (49,105) |
Change in net unrealized gains and losses on marketable securities, net of income tax | (40) |  |  |  | (40)
Change in fair value of derivative instrument, net of income tax | (611) |  |  |  | (611)
Net income | 106,044 |  |  | 106,044 |
Balance at Dec. 31, 2011 | 42,293 | 118 | 295 | 42,491 | (611)
Balance, shares at Dec. 31, 2011 |  | 11,792,456 |  |  |
Tax shortfall associated with stock-based compensation arrangements | (245) |  | (245) |  |
Repurchase of common stock | (25,001) | (5) | (5,214) | (19,782) |
Repurchase of common stock, shares |  | (484,841) |  |  |
Restricted stock forfeitures and cancellations, net of grants |  | 1 | (1) |  |
Restricted stock forfeitures and cancellations, net of grants, shares |  | 79,684 |  |  |
Stock-based compensation | 5,464 |  | 5,464 |  |
Common stock dividends | (47,328) |  |  | (47,328) |
Change in fair value of derivative instrument, net of income tax | (125) |  |  |  | (125)
Net income | 65,930 |  |  | 65,930 |
Balance at Dec. 31, 2012 | 40,988 | 114 | 299 | 41,311 | (736)
Balance, shares at Dec. 31, 2012 |  | 11,387,299 |  |  |
Tax shortfall associated with stock-based compensation arrangements | (3,567) |  | (702) | (2,865) |
Repurchase of common stock | (24,999) | (5) | (1,752) | (23,242) |
Repurchase of common stock, shares |  | (495,085) |  |  |
Restricted stock forfeitures and cancellations, net of grants |  | (1) | 1 |  |
Restricted stock forfeitures and cancellations, net of grants, shares |  | (94,750) |  |  |
Stock-based compensation | 9,291 |  | 9,291 |  |
Change in fair value of derivative instrument, net of income tax | 764 |  |  |  | 764
Net income | 16,425 |  |  | 16,425 |
Balance at Dec. 31, 2013 | $ 38,902 | $ 108 | $ 7,137 | $ 31,629 | $ 28
Balance, shares at Dec. 31, 2013 |  | 10,797,464 |  |  |

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