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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, 2016 | $ 865,842 | $ 473 | $ 255,917 | $ 642,422 | $ (32,970) |
Balance (in shares) at Dec. 31, 2016 |  | 47,437 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 92,617 |  |  | 92,617 |  |
Translation adjustment, net of tax | 21,418 |  |  |  | 21,418 |
Pension adjustment, net of tax | (944) |  |  |  | (944) |
Options exercised | 6,610 | $ 3 | 6,607 |  |  |
Options exercised |  | 223 |  |  |  |
Stock-based compensation expense | 12,565 |  | 12,565 |  |  |
Repurchase of common stock | (70,000) |  | (10,000) |  |  | $ (60,000)
Repurchase of common stock |  | (1,138) |  |  |  |
Retirement of common stock | 0 | $ (5) |  | (19,995) |  | 20,000
Cash dividends declared on common stock, $0.91 per share | (38,400) |  |  | (38,400) |  |
Shares issued from release of restricted stock units | (5,341) | $ 2 | (5,343) |  |  |
Shares issued from release of restricted stock units (in shares) |  | 214 |  |  |  |
Common stock issued | 411 |  | 411 |  |  |
Common stock issued (in shares) |  | 9 |  |  |  |
Balance at Dec. 31, 2017 | 884,778 | $ 473 | 260,157 | 676,644 | (12,496) | (40,000)
Balance (in shares) at Dec. 31, 2017 |  | 46,745 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 126,633 |  |  | 126,633 |  |
Translation adjustment, net of tax | (12,911) |  |  |  | (12,911) |
Pension adjustment, net of tax | 376 |  |  |  | 376 |
Options exercised | 695 | $ 0 | 695 |  |  |
Options exercised |  | 23 |  |  |  |
Stock-based compensation expense | 10,334 |  | 10,334 |  |  |
Repurchase of common stock | (110,540) |  | 10,000 |  |  | (120,540)
Repurchase of common stock |  | (1,955) |  |  |  |
Retirement of common stock | 0 | $ (22) |  | (135,518) |  | 135,540
Cash dividends declared on common stock, $0.91 per share | (39,962) |  |  | (39,962) |  |
Shares issued from release of restricted stock units | (5,145) | $ 2 | (5,147) |  |  |
Shares issued from release of restricted stock units (in shares) |  | 177 |  |  |  |
Common stock issued | 465 |  | 465 |  |  |
Common stock issued (in shares) |  | 8 |  |  |  |
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 | 44,998 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Adoption of new accounting standards | $ 791 |  |  | 410 | 381 |
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 |  | (972) |  |  |  |
Retirement of common stock | 0 | $ (13) |  | (76,424) |  | 76,437
Cash dividends declared on common stock, $0.91 per share | (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 | 44,209 |  |  |  |

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