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Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Accumulated Other Comprehensive Loss [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 184,285 | $ 1,350 | $ 209,216 | $ (53) | $ (26,228)
Balance, shares at Dec. 31, 2014 |  | 134,959,000 |  |  |
Restricted stock issued, net |  | $ 9 | (9) |  |
Restricted stock issued net, shares |  | 861,000 |  |  |
Shares repurchased | (24,116) | $ (12) | (24,104) |  |
Shares repurchased, shares |  | (1,190,000) |  |  |
Exercise of stock options, net | $ 4,520 | $ 37 | 4,483 |  |
Exercise of stock options net, shares | 3,785,473 | 3,785,000 |  |  |
Stock-based compensation | $ 10,900 |  | 10,900 |  |
Tax benefit from stock option exercised and vested restricted shares | 57,474 |  | 57,474 |  |
Other comprehensive income (loss) | (73) |  |  | (73) |
Dividends | (78,540) |  |  |  | (78,540)
Net income | 80,052 |  |  |  | 80,052
Balance at Dec. 31, 2015 | 234,502 | $ 1,384 | 257,960 | (126) | (24,716)
Balance, shares at Dec. 31, 2015 |  | 138,415,000 |  |  |
Restricted stock issued, net |  | $ 16 | (16) |  |
Restricted stock issued net, shares |  | 1,662,000 |  |  |
Shares repurchased | (39,379) | $ (37) | (39,342) |  |
Shares repurchased, shares |  | (3,778,000) |  |  |
Exercise of stock options, net | $ 195 | $ 2 | 193 |  |
Exercise of stock options net, shares | 176,350 | 176,000 |  |  |
Stock-based compensation | $ 14,892 |  | 14,892 |  |
Tax benefit from stock option exercised and vested restricted shares | 8,557 |  | 8,557 |  |
Other comprehensive income (loss) | 82 |  |  | 82 |
Dividends | (43,660) |  | (17,505) |  | (26,155)
Net income | 26,155 |  |  |  | 26,155
Balance at Dec. 31, 2016 | $ 201,344 | $ 1,365 | 224,739 | (44) | (24,716)
Balance, shares at Dec. 31, 2016 | 136,475,000 | 136,475,000 |  |  |
Restricted stock issued, net |  | $ 10 | (10) |  |
Restricted stock issued net, shares |  | 1,022,000 |  |  |
Shares repurchased | $ (7,891) | $ (7) | (7,884) |  |
Shares repurchased, shares |  | (698,000) |  |  |
Exercise of stock options, net | 532 | $ 2 | 530 |  |
Exercise of stock options net, shares |  | 197,000 |  |  |
Stock-based compensation | 14,717 |  | 14,717 |  |
Tax benefit from stock option exercised and vested restricted shares | 492 |  | 492 |  |
Other comprehensive income (loss) | 335 |  |  | 335 |
Dividends | (43,777) |  | (16,578) |  | (27,199)
Net income | 27,199 |  |  |  | 27,199
Balance at Dec. 31, 2017 | $ 192,951 | $ 1,370 | $ 216,006 | $ 291 | $ (24,716)
Balance, shares at Dec. 31, 2017 | 136,996,000 | 136,996,000 |  |  |

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