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v3.19.1

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2017 | $ 523 | $ (100,694) | $ 232,670 | $ (724) | $ 854,176 | $ 985,951
Beginning Balance, Shares at Dec. 31, 2017 | 52,277 | 4,152 |  |  |  |
Comprehensive income |  |  |  | 198 | 73,681 | 73,879
Common stock purchased for treasury |  | $ (508) |  |  |  | (508)
Common stock purchased for treasury, shares |  | 5 |  |  |  |
Restricted shares forfeited, Shares |  | 3 |  |  |  |
Share-based compensation | $ 2 | $ (11,524) | 3,467 |  |  | (8,055)
Share-based compensation, Shares | 160 | 119 |  |  |  |
Exercise of stock options |  |  | 919 |  |  | 919
Exercise of stock options, Shares | 59 |  |  |  |  |
Ending Balance at Mar. 31, 2018 | $ 525 | $ (112,726) | 237,056 | (526) | 926,683 | 1,051,012
Ending Balance, Shares at Mar. 31, 2018 | 52,496 | 4,279 |  |  |  |
Cumulative effect from the adoption of accounting pronouncements, net of taxes |  |  |  |  | (1,174) | (1,174)
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 |  |  |  | (107) | 73,243 | 73,136
Common stock purchased for treasury |  | $ (10,000) |  |  |  | (10,000)
Common stock purchased for treasury, shares |  | 108 |  |  |  |
Restricted shares forfeited, Shares |  | 11 |  |  |  |
Share-based compensation | $ 1 | $ (8,127) | 2,635 |  |  | (5,491)
Share-based compensation, Shares | 149 | 68 |  |  |  |
Exercise of stock options | $ 1 |  | 1,630 |  |  | 1,631
Exercise of stock options, Shares | 83 |  |  |  |  |
Ending Balance at Mar. 31, 2019 | $ 529 | $ (143,579) | $ 261,071 | $ (560) | $ 1,155,412 | $ 1,272,873
Ending Balance, Shares at Mar. 31, 2019 | 52,922 | 4,676 |  |  |  |

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