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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands | Total | Common Stock | Treasury Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Gain (Loss)
--- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2022 |  | 36,158,046 |  |  |  |
Beginning balance at Dec. 31, 2022 | $ 537,073 | $ 38 | $ (128,892) | $ 476,117 | $ 193,221 | $ (3,411)
Beginning balance (in shares) at Dec. 31, 2022 |  |  | 2,151,098 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock-based compensation | 34,192 |  |  | 34,192 |  |
Shares issued pursuant to stock awards (in shares) |  | 496,500 |  |  |  |
Shares issued pursuant to stock awards | 5,524 | $ 1 |  | 5,523 |  |
Employee stock purchase plan activity (in shares) |  | 41,384 |  |  |  |
Employee stock purchase plan activity | $ 4,481 |  |  | 4,481 |  |
Repurchases of common stock, net of costs (in shares) | 0 |  |  |  |  |
Repurchases of common stock, net of costs | $ 0 |  |  |  |  |
Net income | 46,813 |  |  |  | 46,813 |
Foreign currency translation adjustments | (1,446) |  |  |  |  | (1,446)
Unrealized gain on investments, net of tax | 1,376 |  |  |  |  | 1,376
Reclassification of gain on investments into earnings, net of tax | (1,169) |  |  |  |  | (1,169)
Ending balance (in shares) at Sep. 30, 2023 |  | 36,695,930 |  |  |  |
Ending balance at Sep. 30, 2023 | 626,844 | $ 39 | $ (128,892) | 520,313 | 240,034 | (4,650)
Ending balance (in shares) at Sep. 30, 2023 |  |  | 2,151,098 |  |  |
Beginning balance (in shares) at Jun. 30, 2023 |  | 36,646,819 |  |  |  |
Beginning balance at Jun. 30, 2023 | 600,981 | $ 39 | $ (128,892) | 508,484 | 223,192 | (1,842)
Beginning balance (in shares) at Jun. 30, 2023 |  |  | 2,151,098 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock-based compensation | 10,780 |  |  | 10,780 |  |
Shares issued pursuant to stock awards (in shares) |  | 45,952 |  |  |  |
Shares issued pursuant to stock awards | 705 |  |  | 705 |  |
Employee stock purchase plan activity (in shares) |  | 3,159 |  |  |  |
Employee stock purchase plan activity | $ 344 |  |  | 344 |  |
Repurchases of common stock, net of costs (in shares) | 0 |  |  |  |  |
Repurchases of common stock, net of costs | $ 0 |  |  |  |  |
Net income | 16,842 |  |  |  | 16,842 |
Foreign currency translation adjustments | (2,966) |  |  |  |  | (2,966)
Unrealized gain on investments, net of tax | 570 |  |  |  |  | 570
Reclassification of gain on investments into earnings, net of tax | (412) |  |  |  |  | (412)
Ending balance (in shares) at Sep. 30, 2023 |  | 36,695,930 |  |  |  |
Ending balance at Sep. 30, 2023 | $ 626,844 | $ 39 | $ (128,892) | 520,313 | 240,034 | (4,650)
Ending balance (in shares) at Sep. 30, 2023 |  |  | 2,151,098 |  |  |
Beginning balance (in shares) at Dec. 31, 2023 | 36,820,048 | 36,820,048 |  |  |  |
Beginning balance at Dec. 31, 2023 | $ 667,475 | $ 39 | $ (128,892) | 537,061 | 259,045 | 222
Beginning balance (in shares) at Dec. 31, 2023 | 2,151,098 |  | 2,151,098 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock-based compensation | $ 40,075 |  |  | 40,075 |  |
Shares issued pursuant to stock awards (in shares) |  | 488,849 |  |  |  |
Shares issued pursuant to stock awards | 4,198 |  |  | 4,198 |  |
Employee stock purchase plan activity (in shares) |  | 35,416 |  |  |  |
Employee stock purchase plan activity | $ 5,672 |  |  | 5,672 |  |
Repurchases of common stock, net of costs (in shares) | 205,331 | (205,331) | 205,331 |  |  |
Repurchases of common stock, net of costs | $ (37,567) |  | $ (37,567) |  |  |
Reissuances of treasury stock (in shares) |  | 427,461 | (427,461) |  |  |
Reissuances of treasury stock | 91,424 |  | $ 66,711 | 24,713 |  |
Net income | 59,495 |  |  |  | 59,495 |
Foreign currency translation adjustments | (886) |  |  |  |  | (886)
Unrealized gain on investments, net of tax | 1,089 |  |  |  |  | 1,089
Reclassification of gain on investments into earnings, net of tax | $ (1,610) |  |  |  |  | (1,610)
Ending balance (in shares) at Sep. 30, 2024 | 37,566,443 | 37,566,443 |  |  |  |
Ending balance at Sep. 30, 2024 | $ 829,365 | $ 39 | $ (99,748) | 611,719 | 318,540 | (1,185)
Ending balance (in shares) at Sep. 30, 2024 | 1,928,968 |  | 1,928,968 |  |  |
Beginning balance (in shares) at Jun. 30, 2024 |  | 37,086,627 |  |  |  |
Beginning balance at Jun. 30, 2024 | $ 703,421 | $ 39 | $ (162,187) | 574,842 | 295,080 | (4,353)
Beginning balance (in shares) at Jun. 30, 2024 |  |  | 2,333,099 |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Stock-based compensation | 9,996 |  |  | 9,996 |  |
Shares issued pursuant to stock awards (in shares) |  | 72,852 |  |  |  |
Shares issued pursuant to stock awards | 1,884 |  |  | 1,884 |  |
Employee stock purchase plan activity (in shares) |  | 2,833 |  |  |  |
Employee stock purchase plan activity | $ 453 |  |  | 453 |  |
Repurchases of common stock, net of costs (in shares) | 456 | (456) | 456 |  |  |
Repurchases of common stock, net of costs | $ (84) |  | $ (84) |  |  |
Reissuances of treasury stock (in shares) |  | 404,587 | (404,587) |  |  |
Reissuances of treasury stock | 87,067 |  | $ 62,523 | 24,544 |  |
Net income | 23,460 |  |  |  | 23,460 |
Foreign currency translation adjustments | 3,332 |  |  |  |  | 3,332
Unrealized gain on investments, net of tax | 84 |  |  |  |  | 84
Reclassification of gain on investments into earnings, net of tax | $ (248) |  |  |  |  | (248)
Ending balance (in shares) at Sep. 30, 2024 | 37,566,443 | 37,566,443 |  |  |  |
Ending balance at Sep. 30, 2024 | $ 829,365 | $ 39 | $ (99,748) | $ 611,719 | $ 318,540 | $ (1,185)
Ending balance (in shares) at Sep. 30, 2024 | 1,928,968 |  | 1,928,968 |  |  |

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