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Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock | Additional Paid-in Capital | Accumulated Deficit / Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2021 | $ 33 | $ 559,883 | $ (22,722) | $ 1,765 | $ 538,959
Balance (in shares) at Dec. 31, 2021 | 33,240 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income |  |  | 183,079 |  | 183,079
Foreign currency translation adjustments |  |  |  | (4,058) | (4,058)
Change in pension obligation, net of tax |  |  |  | 325 | 325
Exercise of stock options (in shares) | 103 |  |  |  |
Exercise of stock options |  | 1,247 |  |  | 1,247
Issuance of stock under Employee Stock Purchase Plan |  | 1,662 |  |  | 1,662
Issuance of stock under Employee Stock Purchase Plan (in shares) | 29 |  |  |  |
Issuance of restricted shares of common stock |  | (9,907) |  |  | (9,907)
Issuance of restricted shares of common stock (in shares) | 291 |  |  |  |
Stock-based compensation expense |  | 13,444 |  |  | 13,444
Repurchase of common stock |  | (16,030) | (41,465) |  | (57,495)
Repurchase of common stock (in shares) | (888) |  |  |  |
Balance at Dec. 31, 2022 | $ 33 | 550,299 | 118,892 | (1,968) | 667,256
Balance (in shares) at Dec. 31, 2022 | 32,775 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income |  |  | 246,263 |  | 246,263
Foreign currency translation adjustments |  |  |  | 38 | 38
Change in pension obligation, net of tax |  |  |  | 84 | 84
Exercise of stock options (in shares) | 3 |  |  |  |
Exercise of stock options |  | 25 |  |  | 25
Issuance of stock under Employee Stock Purchase Plan |  | 2,057 |  |  | 2,057
Issuance of stock under Employee Stock Purchase Plan (in shares) | 16 |  |  |  |
Issuance of restricted shares of common stock |  | (16,611) |  |  | (16,611)
Issuance of restricted shares of common stock (in shares) | 271 |  |  |  |
Stock-based compensation expense |  | 18,269 |  |  | 18,269
Repurchase of common stock |  | (6,850) | (45,649) |  | (52,499)
Repurchase of common stock (in shares) | (380) |  |  |  |
Balance at Dec. 31, 2023 | $ 33 | 547,189 | 319,506 | (1,846) | 864,882
Balance (in shares) at Dec. 31, 2023 | 32,685 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net income |  |  | 200,992 |  | 200,992
Foreign currency translation adjustments |  |  |  | (4,297) | (4,297)
Change in pension obligation, net of tax |  |  |  | (71) | (71)
Issuance of stock under Employee Stock Purchase Plan |  | 2,385 |  |  | 2,385
Issuance of stock under Employee Stock Purchase Plan (in shares) | 30 |  |  |  |
Issuance of restricted shares of common stock |  | (11,563) |  |  | (11,563)
Issuance of restricted shares of common stock (in shares) | 194 |  |  |  |
Stock-based compensation expense |  | 20,951 |  |  | 20,951
Repurchase of common stock | $ (1) | (10,308) | (50,180) |  | (60,489)
Repurchase of common stock (in shares) | (544) |  |  |  |
Balance at Dec. 31, 2024 | $ 32 | $ 548,654 | $ 470,318 | $ (6,214) | $ 1,012,790
Balance (in shares) at Dec. 31, 2024 | 32,365 |  |  |  |

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