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Consolidated Statements of Stockholders' Equity (Unaudited) Statement - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock [Member] | Treasury Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Loss [Member] | Retained Earnings [Member]
--- | --- | --- | --- | --- | --- | ---
Beginning balance, common stock, shares issued at Dec. 31, 2018 |  | 44,076 |  |  |  |
Beginning balance, net of taxes at Dec. 31, 2018 | $ 672,590 | $ 441 | $ (138,909) | $ 528,654 | $ (47,652) | $ 330,056
Beginning balance, treasury stock, shares at Dec. 31, 2018 |  |  | 5,367 |  |  |
Net income | 11,389 |  |  |  |  | 11,389
Other comprehensive income (loss) | (32) |  |  |  | (32) |
Common stock issued, shares |  | 265 |  |  |  |
Common stock issued, value | 2 | $ 2 |  |  |  |
Stock-based compensation | 2,200 |  |  | 2,200 |  |
Common stock dividends | $ (3,561) |  |  |  |  | (3,561)
Dividends declared per common share | $ 0.09 |  |  |  |  |
Tax withholding payments on stock-based awards | $ (3,569) |  |  | (3,569) |  |
Other | (2) |  |  | (2) |  |
Ending balance, common stock, shares issued at Mar. 31, 2019 |  | 44,341 |  |  |  |
Ending balance, net of taxes at Mar. 31, 2019 | 679,017 | $ 443 | $ (138,909) | 527,283 | (47,684) | 337,884
Ending balance, treasury stock, shares at Mar. 31, 2019 |  |  | 5,367 |  |  |
Beginning balance, common stock, shares issued at Dec. 31, 2018 |  | 44,076 |  |  |  |
Beginning balance, net of taxes at Dec. 31, 2018 | 672,590 | $ 441 | $ (138,909) | 528,654 | (47,652) | 330,056
Beginning balance, treasury stock, shares at Dec. 31, 2018 |  |  | 5,367 |  |  |
Net income | 39,107 |  |  |  |  |
Other comprehensive income (loss) | $ (65) |  |  |  |  |
Dividends declared per common share | $ 0.18 |  |  |  |  |
Ending balance, common stock, shares issued at Jun. 30, 2019 |  | 44,342 |  |  |  |
Ending balance, net of taxes at Jun. 30, 2019 | $ 705,021 | $ 443 | $ (138,909) | 529,147 | (47,717) | 362,057
Ending balance, treasury stock, shares at Jun. 30, 2019 |  |  | 5,367 |  |  |
Beginning balance, common stock, shares issued at Mar. 31, 2019 |  | 44,341 |  |  |  |
Beginning balance, net of taxes at Mar. 31, 2019 | 679,017 | $ 443 | $ (138,909) | 527,283 | (47,684) | 337,884
Beginning balance, treasury stock, shares at Mar. 31, 2019 |  |  | 5,367 |  |  |
Net income | 27,718 |  |  |  |  | 27,718
Other comprehensive income (loss) | (33) |  |  |  | (33) |
Common stock issued, shares |  | 1 |  |  |  |
Common stock issued, value | 0 | $ 0 |  |  |  |
Stock-based compensation | 1,869 |  |  | 1,869 |  |
Common stock dividends | $ (3,545) |  |  |  |  | (3,545)
Dividends declared per common share | $ 0.09 |  |  |  |  |
Tax withholding payments on stock-based awards | $ (5) |  |  | (5) |  |
Ending balance, common stock, shares issued at Jun. 30, 2019 |  | 44,342 |  |  |  |
Ending balance, net of taxes at Jun. 30, 2019 | $ 705,021 | $ 443 | $ (138,909) | 529,147 | (47,717) | 362,057
Ending balance, treasury stock, shares at Jun. 30, 2019 |  |  | 5,367 |  |  |
Beginning balance, common stock, shares issued at Dec. 31, 2019 | 44,353 | 44,353 |  |  |  |
Beginning balance, net of taxes at Dec. 31, 2019 | $ 701,330 | $ 444 | $ (138,909) | 533,345 | (50,248) | 356,698
Beginning balance, treasury stock, shares at Dec. 31, 2019 | 5,367 |  | 5,367 |  |  |
Net income | $ 12,200 |  |  |  |  | 12,200
Other comprehensive income (loss) | 215 |  |  |  | 215 |
Common stock issued, shares |  | 211 |  |  |  |
Common stock issued, value | 2 | $ 2 |  |  |  |
Stock-based compensation | 1,674 |  |  | 1,674 |  |
Common stock dividends | $ (3,866) |  |  |  |  | (3,866)
Dividends declared per common share | $ 0.10 |  |  |  |  |
Tax withholding payments on stock-based awards | $ (3,309) |  |  | (3,309) |  |
Proceeds from exercise of stock options | 27 |  |  | 27 |  |
Other | (2) |  |  | (2) |  |
Ending balance, common stock, shares issued at Mar. 31, 2020 |  | 44,564 |  |  |  |
Ending balance, net of taxes at Mar. 31, 2020 | $ 708,271 | $ 446 | $ (138,909) | 531,735 | (50,033) | 365,032
Ending balance, treasury stock, shares at Mar. 31, 2020 |  |  | 5,367 |  |  |
Beginning balance, common stock, shares issued at Dec. 31, 2019 | 44,353 | 44,353 |  |  |  |
Beginning balance, net of taxes at Dec. 31, 2019 | $ 701,330 | $ 444 | $ (138,909) | 533,345 | (50,248) | 356,698
Beginning balance, treasury stock, shares at Dec. 31, 2019 | 5,367 |  | 5,367 |  |  |
Net income | $ 45,786 |  |  |  |  |
Other comprehensive income (loss) | $ 365 |  |  |  |  |
Dividends declared per common share | $ 0.20 |  |  |  |  |
Ending balance, common stock, shares issued at Jun. 30, 2020 | 44,564 | 44,564 |  |  |  |
Ending balance, net of taxes at Jun. 30, 2020 | $ 739,708 | $ 446 | $ (138,909) | 533,406 | (49,883) | 394,648
Ending balance, treasury stock, shares at Jun. 30, 2020 | 5,367 |  | 5,367 |  |  |
Beginning balance, common stock, shares issued at Mar. 31, 2020 |  | 44,564 |  |  |  |
Beginning balance, net of taxes at Mar. 31, 2020 | $ 708,271 | $ 446 | $ (138,909) | 531,735 | (50,033) | 365,032
Beginning balance, treasury stock, shares at Mar. 31, 2020 |  |  | 5,367 |  |  |
Net income | 33,586 |  |  |  |  | 33,586
Other comprehensive income (loss) | 150 |  |  |  | 150 |
Stock-based compensation | 1,671 |  |  | 1,671 |  |
Common stock dividends | $ (3,970) |  |  |  |  | (3,970)
Dividends declared per common share | $ 0.10 |  |  |  |  |
Ending balance, common stock, shares issued at Jun. 30, 2020 | 44,564 | 44,564 |  |  |  |
Ending balance, net of taxes at Jun. 30, 2020 | $ 739,708 | $ 446 | $ (138,909) | $ 533,406 | $ (49,883) | $ 394,648
Ending balance, treasury stock, shares at Jun. 30, 2020 | 5,367 |  | 5,367 |  |  |

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