Statement Of Cash Flows [Abstract]
| Concept |
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] | |||||
| Income taxes paid (refund), classified as operating activities | — |
53,600,000
EUR
|
31,600,000
EUR
|
— | — |
| Cash flows from (used in) operating activities | — |
360,759,000
EUR
|
349,523,000
EUR
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
5,000
EUR
|
271,000
EUR
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
516,000
EUR
|
1,465,000
EUR
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
74,806,000
EUR
|
104,502,000
EUR
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
6,017,000
EUR
|
6,120,000
EUR
|
— | — |
| Cash advances and loans made to other parties, classified as investing activities | — |
6,357,000
EUR
|
2,414,000
EUR
|
— | — |
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — |
1,799,000
EUR
|
2,239,000
EUR
|
— | — |
| Dividends received, classified as investing activities | — |
575,000
EUR
|
358,000
EUR
|
— | — |
| Interest received, classified as investing activities | — |
2,144,000
EUR
|
1,254,000
EUR
|
— | — |
| Cash flows from (used in) investing activities | — |
109,594,000
EUR
|
124,807,000
EUR
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Payments to acquire or redeem entity's shares | — |
25,505,000
EUR
|
21,698,000
EUR
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
3,086,000
EUR
|
2,970,000
EUR
|
— | — |
| Dividends paid, classified as financing activities | — |
133,283,000
EUR
|
101,668,000
EUR
|
— | — |
| Interest paid, classified as financing activities | — |
247,000
EUR
|
490,000
EUR
|
— | — |
| Cash flows from (used in) financing activities | — |
154,609,000
EUR
|
124,274,000
EUR
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — |
96,556,000
EUR
|
100,442,000
EUR
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | |||||
| Effect of exchange rate changes on cash and cash equivalents | — |
1,655,000
EUR
|
424,000
EUR
|
— | — |
| Cash and cash equivalents |
313,568,000
EUR
|
— | — |
218,667,000
EUR
|
117,801,000
EUR
|