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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands | Total | Ordinary shares | Additional Paid-in Capital | Other Undenominated Capital | Accumulated Other Comprehensive Loss | Retained Earnings
--- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2021 |  | 81,554,683 |  |  |  |
Beginning balance at Dec. 31, 2021 | $ 8,066,827 | $ 6,640 | $ 6,733,910 | $ 1,134 | $ (90,937) | $ 1,416,080
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 111,970 |  |  |  |  | 111,970
Exercise of share options (in shares) |  | 84,090 |  |  |  |
Exercise of share options | 7,497 | $ 6 | 7,491 |  |  |
Issue of restricted share units / performance share units (in shares) |  | 74,769 |  |  |  |
Issue of restricted share units / performance share units | 4 | $ 4 |  |  |  |
Non-cash stock compensation expense | 18,840 |  | 18,840 |  |  |
Share issuance costs | (3) |  | (3) |  |  |
Share repurchase program (in shares) |  | 420,530 |  |  |  |
Share repurchase program | (99,983) | $ (28) |  | 28 |  | (99,983)
Share repurchase costs | (17) |  |  |  |  | (17)
Other comprehensive (loss), net of tax | (35,818) |  |  |  | (35,818) |
Ending balance (in shares) at Mar. 31, 2022 |  | 81,293,012 |  |  |  |
Ending balance at Mar. 31, 2022 | $ 8,069,317 | $ 6,622 | 6,760,238 | 1,162 | (126,755) | 1,428,050
Beginning balance (in shares) at Dec. 31, 2022 | 81,723,555 | 81,723,555 |  |  |  |
Beginning balance at Dec. 31, 2022 | $ 8,497,963 | $ 6,649 | 6,840,306 | 1,162 | (171,538) | 1,821,384
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 116,654 |  |  |  |  | 116,654
Exercise of share options (in shares) |  | 136,649 |  |  |  |
Exercise of share options | 12,936 | $ 9 | 12,927 |  |  |
Issue of restricted share units / performance share units (in shares) |  | 68,218 |  |  |  |
Issue of restricted share units / performance share units | 4 | $ 4 |  |  |  |
Non-cash stock compensation expense | 14,658 |  | 14,658 |  |  |
Share issuance costs | (4) |  | (4) |  |  |
Other comprehensive (loss), net of tax | $ 11,642 |  |  |  | 11,642 |
Ending balance (in shares) at Mar. 31, 2023 | 81,928,422 | 81,928,422 |  |  |  |
Ending balance at Mar. 31, 2023 | $ 8,653,853 | $ 6,662 | $ 6,867,887 | $ 1,162 | $ (159,896) | $ 1,938,038

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