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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2022 |  | 48,148,000 |  |  |  |
Balance at Dec. 31, 2022 | $ 2,624,389 | $ 481 | $ 1,209,725 | $ (844) | $ 1,437,854 | $ (22,827)
Balance (in shares) at Dec. 31, 2022 |  |  |  |  |  | (6,365,000)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 30,875 |  |  |  | 30,875 |
Other comprehensive income, net of tax | 94 |  |  | 94 |  |
Exercise of stock options and vesting of restricted stock units | 8,134 |  | (668) |  |  | $ 8,802
Exercise of stock options and vesting of restricted stock units (in shares) |  |  |  |  |  | 136,000
Employee taxes paid for withheld shares upon equity award settlement | (8,292) |  |  |  |  | $ (8,292)
Employee taxes paid for withheld shares upon equity award settlement (in shares) |  |  |  |  |  | (26,000)
Stock compensation | 27,896 |  | 27,896 |  |  |
Issuance of shares pursuant to employee stock purchase plan | 3,037 |  | 2,992 |  |  | $ 45
Issuance of shares pursuant to employee stock purchase plan (in shares) |  |  |  |  |  | 11,000
Balance (in shares) at Mar. 31, 2023 |  | 48,148,000 |  |  |  |
Balance at Mar. 31, 2023 | $ 2,686,133 | $ 481 | 1,239,945 | (750) | 1,468,729 | $ (22,272)
Balance (in shares) at Mar. 31, 2023 |  |  |  |  |  | (6,244,000)
Balance (in shares) at Dec. 31, 2023 | 48,147,969 | 48,148,000 |  |  |  |
Balance at Dec. 31, 2023 | $ 2,937,995 | $ 481 | 1,354,787 | (326) | 1,603,773 | $ (20,720)
Balance (in shares) at Dec. 31, 2023 | (5,858,476) |  |  |  |  | (5,858,000)
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | $ 54,170 |  |  |  | 54,170 |
Other comprehensive income, net of tax | 53 |  |  | 53 |  |
Exercise of stock options and vesting of restricted stock units | 21,240 |  | (1,738) |  |  | $ 22,978
Exercise of stock options and vesting of restricted stock units (in shares) |  |  |  |  |  | 195,000
Employee taxes paid for withheld shares upon equity award settlement | (11,207) |  |  |  |  | $ (11,207)
Employee taxes paid for withheld shares upon equity award settlement (in shares) |  |  |  |  |  | (26,000)
Stock compensation | 26,866 |  | 26,866 |  |  |
Issuance of shares pursuant to employee stock purchase plan | 3,553 |  | 3,513 |  |  | $ 40
Issuance of shares pursuant to employee stock purchase plan (in shares) |  |  |  |  |  | 10,000
Reimbursement of shares from escrow | $ (9,535) |  | 1,667 |  |  | $ (11,202)
Reimbursement of shares from escrow (in shares) |  |  |  |  |  | (28,000)
Balance (in shares) at Mar. 31, 2024 | 48,147,969 | 48,148,000 |  |  |  |
Balance at Mar. 31, 2024 | $ 3,023,135 | $ 481 | $ 1,385,095 | $ (273) | $ 1,657,943 | $ (20,111)
Balance (in shares) at Mar. 31, 2024 | (5,707,093) |  |  |  |  | (5,707,000)

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