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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2018 | $ 855,514 | $ 453 | $ 276,504 | $ 628,207 | $ (24,650) | $ (25,000)
Balance (in shares) at Dec. 31, 2018 |  | 44,998 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 133,982 |  |  | 133,982 |  |
Translation adjustment, net of tax | 885 |  |  |  | 885 |
Pension adjustment, net of tax | (1,064) |  |  |  | (1,064) |
Stock-based compensation expense | 9,325 |  | 9,325 |  |  |
Repurchase of common stock | (60,816) |  | 0 |  |  | (60,816)
Repurchase of common stock (in shares) |  | (972) |  |  |  |
Retirement of common stock | 0 | $ (13) |  | (76,424) |  | 76,437
Cash dividends declared on common stock | (40,258) |  |  | (40,258) |  |
Shares issued from release of restricted stock units | (5,903) | $ 2 | (5,905) |  |  |
Shares issued from release of restricted stock units (in shares) |  | 178 |  |  |  |
Common stock issued | 292 |  | 292 |  |  |
Common stock issued (in shares) |  | 5 |  |  |  |
Balance at Dec. 31, 2019 | 891,957 | $ 442 | 280,216 | 645,507 | (24,829) | (9,379)
Balance (in shares) at Dec. 31, 2019 |  | 44,209 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 187,000 |  |  | 187,000 |  |
Translation adjustment, net of tax | 14,172 |  |  |  | 14,172 |
Pension adjustment, net of tax | (161) |  |  |  | (161) |
Cash flow hedge adjustment, net of tax | 390 |  |  |  | 390 |
Stock-based compensation expense | 11,410 |  | 11,410 |  |  |
Repurchase of common stock | (76,189) |  | 0 |  |  | (76,189)
Repurchase of common stock (in shares) |  | (1,053) |  |  |  |
Retirement of common stock | 0 | $ (10) |  | (72,048) |  | 72,058
Cash dividends declared on common stock | (40,018) |  |  | (40,018) |  |
Shares issued from release of restricted stock units | (7,959) | $ 1 | (7,960) |  |  |
Shares issued from release of restricted stock units (in shares) |  | 166 |  |  |  |
Common stock issued | 341 |  | 341 |  |  |
Common stock issued (in shares) |  | 4 |  |  |  |
Balance at Dec. 31, 2020 | $ 980,943 | $ 433 | 284,007 | 720,441 | (10,428) | (13,510)
Balance (in shares) at Dec. 31, 2020 | 43,326 | 43,326 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | $ 266,447 |  |  | 266,447 |  |
Translation adjustment, net of tax | (7,313) |  |  |  | (7,313) |
Pension adjustment, net of tax | 404 |  |  |  | 404 |
Cash flow hedge adjustment, net of tax | (268) |  |  |  | (268) |
Stock-based compensation expense | 15,029 |  | 15,029 |  |  |
Repurchase of common stock | (24,125) |  | 0 |  |  | (24,125)
Repurchase of common stock (in shares) |  | (222) |  |  |  |
Retirement of common stock | 0 | $ (3) |  | (37,632) |  | 37,635
Cash dividends declared on common stock | (42,415) |  |  | (42,415) |  |
Shares issued from release of restricted stock units | (5,395) | $ 2 | (5,397) |  |  |
Shares issued from release of restricted stock units (in shares) |  | 106 |  |  |  |
Common stock issued | 691 |  | 691 |  |  |
Common stock issued (in shares) |  | 7 |  |  |  |
Balance at Dec. 31, 2021 | $ 1,183,998 | $ 432 | $ 294,330 | $ 906,841 | $ (17,605) | $ 0
Balance (in shares) at Dec. 31, 2021 | 43,217 | 43,217 |  |  |  |

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