Income Tax, Movements in deferred tax assets and liabilities (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Deferred tax assets [Abstract] | ||
| Beginning of period | $ 147,966 | $ 136,066 |
| Increase/(decrease) through the consolidated income statement | 6,003 | 5,809 |
| Increase/(decrease) through other consolidated comprehensive income (equity) | (8,698) | 6,147 |
| Other movements | 7,019 | (56) |
| End of period | 152,290 | 147,966 |
| Deferred tax liabilities [Abstract] | ||
| Beginning of period | 248,996 | 211,000 |
| Increase/(decrease) through the consolidated income statement | 9,675 | 31,678 |
| Business combinations | 2,539 | |
| Other movements | 2,252 | 3,779 |
| End of period | $ 260,923 | $ 248,996 |