Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2018-12-31 |
|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||
| Property, plant and equipment [abstract] | ||||
| Property, plant and equipment |
356,219,000
EUR
|
— |
326,497,000
EUR
|
— |
| Intangible assets and goodwill [abstract] | ||||
| Intangible assets other than goodwill [abstract] | ||||
| Intangible assets other than goodwill |
426,835,000
EUR
|
— |
391,954,000
EUR
|
— |
| Goodwill |
131,034,000
EUR
|
— |
130,311,000
EUR
|
— |
| Investments accounted for using equity method [abstract] | ||||
| Investments accounted for using equity method |
13,252,000
EUR
|
— |
13,628,000
EUR
|
— |
| Miscellaneous non-current assets [abstract] | ||||
| Other non-current assets |
3,137,000
EUR
|
— |
5,470,000
EUR
|
— |
| Trade and other current receivables [abstract] | ||||
| Current trade receivables |
144,887,000
EUR
|
— |
175,196,000
EUR
|
— |
| Classes of current inventories [abstract] | ||||
| Current inventories |
298,744,000
EUR
|
— |
321,642,000
EUR
|
— |
| Classes of current inventories, alternative [abstract] | ||||
| Cash and cash equivalents [abstract] | ||||
| Cash and cash equivalents |
218,270,000
EUR
|
160,864,000
EUR
|
160,864,000
EUR
|
89,347,000
EUR
|
| Trade and other current payables [abstract] | ||||
| Current trade payables |
262,099,000
EUR
|
— |
222,628,000
EUR
|
— |
| Categories of non-current financial liabilities [abstract] | ||||
| Non-current financial liabilities |
456,089,000
EUR
|
— |
470,309,000
EUR
|
— |
| Categories of current financial liabilities [abstract] | ||||
| Current financial liabilities |
74,594,000
EUR
|
— |
86,358,000
EUR
|
— |
| Miscellaneous non-current liabilities [abstract] | ||||
| Other non-current liabilities |
9,735,000
EUR
|
— |
9,537,000
EUR
|
— |
| Miscellaneous current liabilities [abstract] | ||||
| Other current liabilities |
86,616,000
EUR
|
— |
77,702,000
EUR
|
— |
| Issued capital [abstract] | ||||
| Issued capital |
22,539,000
EUR
|
— |
22,539,000
EUR
|
— |
| Miscellaneous equity [abstract] | ||||
| Capital reserve |
9,949,000
EUR
|
— |
9,949,000
EUR
|
— |
| Net assets (liabilities) [abstract] | ||||
| Assets |
1,686,034,000
EUR
|
— |
1,613,892,000
EUR
|
— |
| Net current assets (liabilities) [abstract] | ||||
| Current assets |
744,039,000
EUR
|
— |
736,032,000
EUR
|
— |
| Current liabilities |
450,486,000
EUR
|
— |
406,602,000
EUR
|
— |
| Assets less current liabilities [abstract] |