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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
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 115,734 |  |  |  |  | 115,734
Exercise of share options (in shares) |  | 75,671 |  |  |  |
Exercise of share options | 7,653 | $ 4 | 7,649 |  |  |
Issue of restricted share units / performance share units (in shares) |  | 157,924 |  |  |  |
Issue of restricted share units / performance share units | 11 | $ 11 |  |  |  |
Non-cash stock compensation expense | 19,478 |  | 19,478 |  |  |
Other comprehensive loss, net of tax | (66,180) |  |  |  | (66,180) |
Ending balance (in shares) at Jun. 30, 2022 |  | 81,526,607 |  |  |  |
Ending balance at Jun. 30, 2022 | 8,146,013 | $ 6,637 | 6,787,365 | 1,162 | (192,935) | 1,543,784
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 160,154 |  |  |  |  | 160,154
Exercise of share options (in shares) |  | 117,140 |  |  |  |
Exercise of share options | 13,831 | $ 4 | 13,827 |  |  |
Issue of restricted share units / performance share units (in shares) |  | 1,532 |  |  |  |
Issue of restricted share units / performance share units | 4 | $ 4 |  |  |  |
Non-cash stock compensation expense | 17,686 |  | 17,686 |  |  |
Share issuance costs | (1) |  | (1) |  |  |
Other comprehensive loss, net of tax | (98,966) |  |  |  | (98,966) |
Ending balance (in shares) at Sep. 30, 2022 |  | 81,645,279 |  |  |  |
Ending balance at Sep. 30, 2022 | $ 8,238,721 | $ 6,645 | 6,818,877 | 1,162 | (291,901) | 1,703,938
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 |  |  |  |
Ending balance at Mar. 31, 2023 | $ 8,653,853 | $ 6,662 | 6,867,887 | 1,162 | (159,896) | 1,938,038
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
Ending balance (in shares) at Sep. 30, 2023 | 82,326,976 | 82,326,976 |  |  |  |
Ending balance at Sep. 30, 2023 | $ 8,959,034 | $ 6,688 | 6,924,073 | 1,162 | (190,190) | 2,217,301
Beginning balance (in shares) at Mar. 31, 2023 |  | 81,928,422 |  |  |  |
Beginning balance at Mar. 31, 2023 | 8,653,853 | $ 6,662 | 6,867,887 | 1,162 | (159,896) | 1,938,038
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 115,598 |  |  |  |  | 115,598
Exercise of share options (in shares) |  | 93,304 |  |  |  |
Exercise of share options | 7,229 | $ 6 | 7,223 |  |  |
Issue of restricted share units / performance share units (in shares) |  | 129,323 |  |  |  |
Issue of restricted share units / performance share units | 8 | $ 8 |  |  |  |
Non-cash stock compensation expense | 16,389 |  | 16,389 |  |  |
Share issuance costs | (5) |  | (5) |  |  |
Other comprehensive loss, net of tax | 3,368 |  |  |  | 3,368 |
Ending balance (in shares) at Jun. 30, 2023 |  | 82,151,049 |  |  |  |
Ending balance at Jun. 30, 2023 | 8,796,440 | $ 6,676 | 6,891,494 | 1,162 | (156,528) | 2,053,636
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 163,665 |  |  |  |  | 163,665
Exercise of share options (in shares) |  | 147,661 |  |  |  |
Exercise of share options | 16,337 | $ 9 | 16,328 |  |  |
Issue of restricted share units / performance share units (in shares) |  | 28,266 |  |  |  |
Issue of restricted share units / performance share units | 3 | $ 3 |  |  |  |
Non-cash stock compensation expense | 16,256 |  | 16,256 |  |  |
Share issuance costs | (5) |  | (5) |  |  |
Other comprehensive loss, net of tax | $ (33,662) |  |  |  | (33,662) |
Ending balance (in shares) at Sep. 30, 2023 | 82,326,976 | 82,326,976 |  |  |  |
Ending balance at Sep. 30, 2023 | $ 8,959,034 | $ 6,688 | $ 6,924,073 | $ 1,162 | $ (190,190) | $ 2,217,301

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