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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Paid-in Capital | Retained Earnings
--- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2014 |  | 54,042 |  |
Balance at Dec. 31, 2014 | $ 174,059 | $ 216 | $ 0 | $ 173,843
Net income | 45,728 |  |  | 45,728
Stock options exercised and restricted stock awards granted, including tax benefits (in shares) |  | 546 |  |
Stock options exercised and restricted stock awards granted, including tax benefits | 5,240 | $ 2 | 5,238 |
Share-based compensation | 2,891 |  | 2,891 |
Stock repurchased and retired (in shares) |  | (1,576) |  |
Stock repurchased and retired | (37,143) | $ (6) | (8,129) | (29,008)
Dividends | (11,857) |  |  | (11,857)
Balance (in shares) at Dec. 31, 2015 |  | 53,012 |  |
Balance at Dec. 31, 2015 | 178,918 | $ 212 | 0 | 178,706
Net income | 53,376 |  |  | 53,376
Stock options exercised and restricted stock awards granted, including tax benefits (in shares) |  | 375 |  |
Stock options exercised and restricted stock awards granted, including tax benefits | 2,063 | $ 2 | 2,061 |
Share-based compensation | 4,357 |  | 4,357 |
Stock repurchased and retired (in shares) |  | (736) |  |
Stock repurchased and retired | (20,140) | $ (3) | (6,418) | (13,719)
Dividends | (12,676) |  |  | (12,676)
Balance (in shares) at Dec. 31, 2016 |  | 52,651 |  |
Balance at Dec. 31, 2016 | 205,898 | $ 211 | 0 | 205,687
Net income | 54,498 |  |  | 54,498
Stock options exercised and restricted stock awards granted, including tax benefits (in shares) |  | 293 |  |
Stock options exercised and restricted stock awards granted, including tax benefits | 2,259 | $ 1 | 2,258 |
Share-based compensation | 6,458 |  | 6,458 |
Stock repurchased and retired (in shares) |  | (522) |  |
Stock repurchased and retired | (18,234) | $ (2) | (8,716) | (9,516)
Dividends | (13,653) |  |  | (13,653)
Balance (in shares) at Dec. 31, 2017 |  | 52,422 |  |
Balance at Dec. 31, 2017 | $ 237,226 | $ 210 | $ 0 | $ 237,016

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