Common shares and Treasury stock (Details) - shares |
12 Months Ended | ||||||||
---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|||||||
Common Stock, Shares Outstanding [Roll Forward] | |||||||||
Beginning balance (in shares) | 60,675,474 | 60,639,570 | |||||||
Issuance of shares under share option and free share plans (in shares) | (2,634,619) | (388,759) | |||||||
Treasury Shares Issued for RSU Vesting (in shares) | 1,625,742 | 1,573,696 | |||||||
Treasury Shares Retired (in shares) | 2,732,386 | 1,498,709 | |||||||
Share repurchase program (in shares) | (5,135,359) | (2,647,742) | |||||||
Ending balance (in shares) | 57,263,624 | 60,675,474 | 60,639,570 | ||||||
Share capital | |||||||||
Common Stock, Shares Outstanding [Roll Forward] | |||||||||
Beginning balance (in shares) | 65,883,347 | 66,272,106 | 66,197,181 | ||||||
Share repurchase program (in shares) | (2,732,386) | [1] | (1,498,709) | [2] | |||||
Ending balance (in shares) | 63,248,728 | 65,883,347 | 66,272,106 | ||||||
Treasury stock | |||||||||
Common Stock, Shares Outstanding [Roll Forward] | |||||||||
Treasury stock beginning balance (in shares) | (5,207,873) | (5,632,536) | |||||||
Treasury stock ending balance (in shares) | (5,985,104) | (5,207,873) | (5,632,536) | ||||||
|