Statement Of Cash Flows [Abstract]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2018-12-31 |
|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||
| Cash flows from (used in) operating activities [abstract] | |||||||
| Interest paid, classified as operating activities | — |
3,382,000
USD
|
— |
2,651,000
USD
|
2,495,000
USD
|
— | — |
| Interest received, classified as operating activities | — |
214,000
USD
|
— |
1,155,000
USD
|
3,648,000
USD
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
27,766,000
USD
|
— |
20,737,000
USD
|
—
USD
|
— | — |
| Other inflows (outflows) of cash, classified as operating activities | — |
103,000
USD
|
— |
—
USD
|
—
USD
|
— | — |
| Cash flows from (used in) operating activities | — |
158,274,000
USD
|
— |
131,827,000
USD
|
98,156,000
USD
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
—
USD
|
— |
—
USD
|
16,036,000
USD
|
— | — |
| Other cash receipts from sales of equity or debt instruments of other entities, classified as investing activities | — |
218,125,000
USD
|
— |
350,586,000
USD
|
9,294,000
USD
|
— | — |
| Other cash payments to acquire equity or debt instruments of other entities, classified as investing activities | — |
500,000
USD
|
— |
1,150,000
USD
|
1,556,000
USD
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
30,000
USD
|
— |
—
USD
|
—
USD
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
5,571,000
USD
|
— |
5,170,000
USD
|
12,138,000
USD
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
90,000
USD
|
— |
254,000
USD
|
400,000
USD
|
— | — |
| Cash flows from (used in) investing activities | — |
197,375,000
USD
|
— |
364,478,000
USD
|
63,659,000
USD
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||||
| Payments from changes in ownership interests in subsidiaries that do not result in loss of control | — |
806,000
USD
|
— |
—
USD
|
—
USD
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
3,375,000
USD
|
— |
2,908,000
USD
|
1,678,000
USD
|
— | — |
| Other inflows (outflows) of cash, classified as financing activities | — |
5,000
USD
|
— |
—
USD
|
—
USD
|
— | — |
| Cash flows from (used in) financing activities | — |
22,727,000
USD
|
— |
38,869,000
USD
|
49,910,000
USD
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
—
USD
|
— |
—
USD
|
104,000
USD
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
61,827,000
USD
|
— |
271,520,000
USD
|
15,309,000
USD
|
— | — |
| Cash and cash equivalents |
465,708,000
USD
|
— |
403,881,000
USD
|
— | — |
132,360,000
USD
|
117,051,000
USD
|