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v3.20.2

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock | Treasury Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Total
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2018 | $ 527 | $ (125,452) | $ 256,806 | $ (453) | $ 1,082,169 | $ 1,213,597
Beginning Balance, Shares at Dec. 31, 2018 | 52,690 | 4,489 |  |  |  |
Comprehensive income |  |  |  | (329) | 182,506 | 182,177
Common stock purchased for treasury |  | $ (17,293) |  |  |  | (17,293)
Common stock acquired, shares |  | 175 |  |  |  |
Restricted shares forfeited, Shares |  | 15 |  |  |  |
Share-based compensation | $ 1 | $ (8,127) | 7,739 |  |  | (387)
Share-based compensation, Shares | 152 | 68 |  |  |  |
Exercise of stock options | $ 2 |  | 3,734 |  |  | 3,736
Exercise of stock options, Shares | 208 |  |  |  |  |
Ending Balance at Sep. 30, 2019 | $ 530 | $ (150,872) | 268,279 | $ (782) | 1,264,675 | 1,381,830
Ending Balance, Shares at Sep. 30, 2019 | 53,050 | 4,747 |  |  |  |
Beginning Balance at Dec. 31, 2019 | $ 531 | $ (169,365) | 270,923 |  | 1,341,344 | 1,443,433
Beginning Balance, Shares at Dec. 31, 2019 | 53,054 | 4,949 |  |  |  |
Comprehensive income |  |  |  |  | 170,441 | 170,441
Common stock purchased for treasury |  | $ (92,315) |  |  |  | (92,315)
Common stock acquired, shares |  | 1,164 |  |  |  |
Restricted shares forfeited, Shares |  | 11 |  |  |  |
Share-based compensation | $ 1 | $ (4,969) | 8,046 |  |  | 3,078
Share-based compensation, Shares | 167 | 62 |  |  |  |
Exercise of stock options |  |  | 178 |  |  | 178
Exercise of stock options, Shares | 10 |  |  |  |  |
Ending Balance at Sep. 30, 2020 | $ 532 | $ (266,649) | $ 279,147 |  | 1,507,953 | 1,520,983
Ending Balance, Shares at Sep. 30, 2020 | 53,231 | 6,186 |  |  |  |
Cumulative effect from the adoption of accounting pronouncements, net of taxes |  |  |  |  | $ (3,832) | $ (3,832)

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