Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||||
| Property, plant and equipment [abstract] | ||||||
| Property, plant and equipment |
667,059
EUR
|
604,711
EUR
|
664,644
EUR
|
600,532
EUR
|
— | — |
| Intangible assets and goodwill [abstract] | ||||||
| Intangible assets and goodwill |
220,116
EUR
|
180,251
EUR
|
190,033
EUR
|
141,451
EUR
|
— | — |
| Investment property [abstract] | ||||||
| Investment property |
4,545
EUR
|
7,641
EUR
|
1,258
EUR
|
4,230
EUR
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||||
| Investments in subsidiaries reported in separate financial statements |
0
EUR
|
38,276
EUR
|
0
EUR
|
37,001
EUR
|
— | — |
| Trade and other non-current receivables [abstract] | ||||||
| Other non-current receivables |
18,300
EUR
|
18,294
EUR
|
17,081
EUR
|
17,639
EUR
|
— | — |
| Non-current prepayments and non-current accrued income including non-current contract assets [abstract] | ||||||
| Non-current accrued income including non-current contract assets [abstract] | ||||||
| Non-current contract assets |
2,854
EUR
|
2,469
EUR
|
2,668
EUR
|
2,337
EUR
|
— | — |
| Trade and other current receivables [abstract] | ||||||
| Trade and other current receivables |
156,152
EUR
|
148,378
EUR
|
162,936
EUR
|
159,360
EUR
|
— | — |
| Current prepayments and current accrued income including current contract assets [abstract] | ||||||
| Current accrued income including current contract assets [abstract] | ||||||
| Current contract assets |
17,263
EUR
|
17,167
EUR
|
23,527
EUR
|
23,263
EUR
|
— | — |
| Classes of current inventories [abstract] | ||||||
| Current inventories |
22,478
EUR
|
19,603
EUR
|
26,175
EUR
|
21,811
EUR
|
— | — |
| Classes of current inventories, alternative [abstract] | ||||||
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
15,935
EUR
|
3,754
EUR
|
8,167
EUR
|
2,086
EUR
|
1,153
EUR
|
13,219
EUR
|
| Non-current assets or disposal groups classified as held for sale or as held for distribution to owners [abstract] | ||||||
| Non-current assets or disposal groups classified as held for sale |
799,000
EUR
|
799,000
EUR
|
214,000
EUR
|
214,000
EUR
|
— | — |
| Miscellaneous current assets [abstract] | ||||||
| Current investments |
740,000
EUR
|
12,177
EUR
|
512,000
EUR
|
17,414
EUR
|
— | — |
| Borrowings [abstract] | ||||||
| Non-current portion of non-current borrowings |
309,023
EUR
|
309,023
EUR
|
184,221
EUR
|
184,221
EUR
|
— | — |
| Current borrowings and current portion of non-current borrowings [abstract] | ||||||
| Current borrowings and current portion of non-current borrowings |
40,015
EUR
|
41,415
EUR
|
32,080
EUR
|
45,095
EUR
|
— | — |
| Non-current portion of non-current borrowings, by type [abstract] | ||||||
| Current borrowings and current portion of non-current borrowings, by type [abstract] | ||||||
| Trade and other non-current payables [abstract] | ||||||
| Non-current accruals and non-current deferred income including non-current contract liabilities [abstract] | ||||||
| Non-current deferred income including non-current contract liabilities [abstract] | ||||||
| Non-current contract liabilities [abstract] | ||||||
| Non-current contract liabilities |
14,278
EUR
|
13,752
EUR
|
14,955
EUR
|
14,301
EUR
|
— | — |
| Accruals classified as non-current |
891,000
EUR
|
713,000
EUR
|
817,000
EUR
|
673,000
EUR
|
— | — |
| Other non-current payables |
18,455
EUR
|
12,281
EUR
|
38,896
EUR
|
20,856
EUR
|
— | — |
| Trade and other current payables [abstract] | ||||||
| Current accruals and current deferred income including current contract liabilities [abstract] | ||||||
| Current deferred income including current contract liabilities [abstract] | ||||||
| Current contract liabilities [abstract] | ||||||
| Current contract liabilities |
12,318
EUR
|
8,452
EUR
|
12,656
EUR
|
8,707
EUR
|
— | — |
| Accruals classified as current |
28,786
EUR
|
26,463
EUR
|
41,857
EUR
|
40,521
EUR
|
— | — |
| Trade and other current payables |
130,955
EUR
|
116,381
EUR
|
119,058
EUR
|
109,755
EUR
|
— | — |
| Issued capital [abstract] | ||||||
| Issued capital |
272,721
EUR
|
272,721
EUR
|
272,721
EUR
|
272,721
EUR
|
— | — |
| Retained earnings [abstract] | ||||||
| Retained earnings |
41,938
EUR
|
55,515
EUR
|
33,305
EUR
|
50,359
EUR
|
— | — |
| Accumulated other comprehensive income [abstract] | ||||||
| Reserve of exchange differences on translation |
9,000
EUR
|
0
EUR
|
25,000
EUR
|
0
EUR
|
— | — |
| Reserve of remeasurements of defined benefit plans |
2,139
EUR
|
1,863
EUR
|
2,988
EUR
|
2,733
EUR
|
— | — |
| Miscellaneous equity [abstract] | ||||||
| Statutory reserve |
54,854
EUR
|
54,544
EUR
|
54,854
EUR
|
54,544
EUR
|
— | — |
| Capital reserve |
181,489
EUR
|
180,956
EUR
|
181,489
EUR
|
180,956
EUR
|
— | — |
| Net assets (liabilities) [abstract] | ||||||
| Assets |
1.250.339
EUR
|
1.237.941
EUR
|
1.227.839
EUR
|
1.226.566
EUR
|
— | — |
| Liabilities |
649,908
EUR
|
625,700
EUR
|
637,355
EUR
|
620,782
EUR
|
— | — |
| Net current assets (liabilities) [abstract] | ||||||
| Current assets |
217,133
EUR
|
205,028
EUR
|
225,781
EUR
|
227,912
EUR
|
— | — |
| Current liabilities |
225,304
EUR
|
207,213
EUR
|
317,160
EUR
|
316,975
EUR
|
— | — |
| Assets less current liabilities [abstract] |