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Performance B.4.1. Share-based compensation - Plan awards and shares expected to vest (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 shares | Dec. 31, 2020 shares | Dec. 31, 2019 shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Shares issued (in shares) | (723,668) | (453,969) |  |
Shares still expected to vest (in shares) | 1,112,771 | 574,234 |  |
2022 Performance Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 306,641 |  |  |
Additional shares granted (in shares) | 0 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 83,926 |  |  |
Revision for forfeitures (in shares) | 0 |  |  |
Revision for cancellations (in shares) | 0 |  |  |
Total before issuances (in shares) | 390,567 |  |  |
Shares issued (in shares) | 0 |  |  |
Performance conditions (in shares) | 0 |  |  |
Shares still expected to vest (in shares) | 390,567 |  |  |
Estimated cost over the vesting period | $ | $ 7,000 |  |  |
2022 Deferred Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 865,862 |  |  |
Additional shares granted (in shares) | 47,588 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 227,947 |  |  |
Revision for forfeitures (in shares) | (21,990) |  |  |
Revision for cancellations (in shares) | 0 |  |  |
Total before issuances (in shares) | 1,119,407 |  |  |
Shares issued (in shares) | (13,957) |  |  |
Performance conditions (in shares) | 0 |  |  |
Shares still expected to vest (in shares) | 1,105,450 |  |  |
Estimated cost over the vesting period | $ | $ 20,000 |  |  |
2021 Performance Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 451,363 |  |  |
Additional shares granted (in shares) | 0 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 115,575 |  |  |
Revision for forfeitures (in shares) | (25,938) |  |  |
Revision for cancellations (in shares) | 0 |  |  |
Total before issuances (in shares) | 541,000 |  |  |
Shares issued (in shares) | (2,071) | (1,121) |  |
Performance conditions (in shares) | 0 |  |  |
Shares still expected to vest (in shares) | 537,808 |  |  |
Estimated cost over the vesting period | $ | $ 16,000 |  |  |
2021 Deferred Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 536,890 |  |  |
Additional shares granted (in shares) | 5,824 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 93,375 |  |  |
Revision for forfeitures (in shares) | (28,130) |  |  |
Revision for cancellations (in shares) | (9,250) |  |  |
Total before issuances (in shares) | 598,709 |  |  |
Shares issued (in shares) | (160,596) | (5,760) |  |
Performance conditions (in shares) | 0 |  |  |
Shares still expected to vest (in shares) | 432,353 |  |  |
Estimated cost over the vesting period | $ | $ 19,000 |  |  |
2020 Performance Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 341,897 |  |  |
Additional shares granted (in shares) | 0 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 20,862 |  |  |
Revision for forfeitures (in shares) | (265,632) |  |  |
Revision for cancellations (in shares) | 0 |  |  |
Total before issuances (in shares) | 97,127 |  |  |
Shares issued (in shares) | 0 | 0 | 0 |
Performance conditions (in shares) | (97,127) |  |  |
Shares still expected to vest (in shares) | 0 |  |  |
Estimated cost over the vesting period | $ | $ 4,000 |  |  |
2020 Deferred Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 370,131 |  |  |
Additional shares granted (in shares) | 5,928 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 32,526 |  |  |
Revision for forfeitures (in shares) | (34,857) |  |  |
Revision for cancellations (in shares) | (4,996) |  |  |
Total before issuances (in shares) | 368,732 |  |  |
Shares issued (in shares) | (100,362) | (113,653) | (3,571) |
Performance conditions (in shares) | 0 |  |  |
Shares still expected to vest (in shares) | 151,146 |  |  |
Estimated cost over the vesting period | $ | $ 15,000 |  |  |
2019 Performance Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 257,601 |  |  |
Additional shares granted (in shares) | 0 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 0 |  |  |
Revision for forfeitures (in shares) | (257,293) |  |  |
Revision for cancellations (in shares) | 0 |  |  |
Total before issuances (in shares) | 308 |  |  |
Shares issued (in shares) | (141) | 0 | (17) | (150)
Performance conditions (in shares) | 0 |  |  |
Shares still expected to vest (in shares) | 0 |  |  |
2019 Deferred Plan |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |
Initial shares granted (in shares) | 297,856 |  |  |
Additional shares granted (in shares) | 43,115 |  |  |
Number of shares for rights offering, in share-based payment arrangement (in shares) | 0 |  |  |
Revision for forfeitures (in shares) | (32,253) |  |  |
Revision for cancellations (in shares) | 0 |  |  |
Total before issuances (in shares) | 308,718 |  |  |
Shares issued (in shares) | (100,654) | (87,141) | (96,629) | (24,294)
Performance conditions (in shares) | 0 |  |  |
Shares still expected to vest (in shares) | 0 |  |  |

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