Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | ||||||
| Property, plant and equipment [abstract] | ||||||
| Property, plant and equipment |
679,501
EUR
|
604,932
EUR
|
667,059
EUR
|
604,711
EUR
|
— | — |
| Intangible assets and goodwill [abstract] | ||||||
| Intangible assets and goodwill |
204,352
EUR
|
155,259
EUR
|
220,116
EUR
|
180,251
EUR
|
— | — |
| Investment property [abstract] | ||||||
| Investment property |
4,304
EUR
|
7,457
EUR
|
4,545
EUR
|
7,641
EUR
|
— | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements [abstract] | ||||||
| Investments in subsidiaries reported in separate financial statements |
0
EUR
|
38,720
EUR
|
0
EUR
|
38,276
EUR
|
— | — |
| Trade and other non-current receivables [abstract] | ||||||
| Other non-current receivables |
19,251
EUR
|
19,246
EUR
|
18,300
EUR
|
18,294
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 |
3,624
EUR
|
3,234
EUR
|
2,854
EUR
|
2,469
EUR
|
— | — |
| Trade and other current receivables [abstract] | ||||||
| Trade and other current receivables |
157,680
EUR
|
150,884
EUR
|
155,944
EUR
|
148,262
EUR
|
— | — |
| Current prepayments and current accrued income including current contract assets [abstract] | ||||||
| Current accrued income including current contract assets [abstract] | ||||||
| Current contract assets |
15,942
EUR
|
15,562
EUR
|
17,263
EUR
|
17,167
EUR
|
— | — |
| Classes of current inventories [abstract] | ||||||
| Current inventories |
25,253
EUR
|
21,702
EUR
|
22,478
EUR
|
19,603
EUR
|
— | — |
| Classes of current inventories, alternative [abstract] | ||||||
| Cash and cash equivalents [abstract] | ||||||
| Cash and cash equivalents |
37,382
EUR
|
19,573
EUR
|
15,935
EUR
|
3,754
EUR
|
8,167
EUR
|
2,086
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 |
796,000
EUR
|
796,000
EUR
|
799,000
EUR
|
799,000
EUR
|
— | — |
| Miscellaneous current assets [abstract] | ||||||
| Current investments |
837,000
EUR
|
11,516
EUR
|
740,000
EUR
|
12,177
EUR
|
— | — |
| Borrowings [abstract] | ||||||
| Non-current portion of non-current borrowings |
236,683
EUR
|
236,683
EUR
|
309,023
EUR
|
309,023
EUR
|
— | — |
| Current borrowings and current portion of non-current borrowings [abstract] | ||||||
| Current borrowings and current portion of non-current borrowings |
132,757
EUR
|
132,757
EUR
|
40,015
EUR
|
41,415
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 |
17,072
EUR
|
16,425
EUR
|
14,278
EUR
|
13,752
EUR
|
— | — |
| Accruals classified as non-current |
5,810
EUR
|
666,000
EUR
|
891,000
EUR
|
713,000
EUR
|
— | — |
| Other non-current payables |
8,177
EUR
|
3,847
EUR
|
18,455
EUR
|
12,281
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 |
10,275
EUR
|
5,602
EUR
|
12,318
EUR
|
8,452
EUR
|
— | — |
| Accruals classified as current |
35,691
EUR
|
30,161
EUR
|
28,786
EUR
|
26,463
EUR
|
— | — |
| Trade and other current payables |
123,915
EUR
|
99,300
EUR
|
130,955
EUR
|
116,381
EUR
|
— | — |
| Issued capital [abstract] | ||||||
| Issued capital |
272,721
EUR
|
272,721
EUR
|
272,721
EUR
|
272,721
EUR
|
— | — |
| Retained earnings [abstract] | ||||||
| Retained earnings, profit (loss) for reporting period |
37,506
EUR
|
20,793
EUR
|
37,888
EUR
|
34,371
EUR
|
— | — |
| Retained earnings, excluding profit (loss) for reporting period |
12,497
EUR
|
26,076
EUR
|
4,050
EUR
|
21,144
EUR
|
— | — |
| Retained earnings |
50,003
EUR
|
46,869
EUR
|
41,938
EUR
|
55,515
EUR
|
— | — |
| Accumulated other comprehensive income [abstract] | ||||||
| Revaluation surplus |
188,000
EUR
|
188,000
EUR
|
66,000
EUR
|
66,000
EUR
|
— | — |
| Reserve of exchange differences on translation |
18,000
EUR
|
0
EUR
|
9,000
EUR
|
0
EUR
|
— | — |
| Reserve of remeasurements of defined benefit plans |
1,155
EUR
|
897,000
EUR
|
2,139
EUR
|
1,863
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 |
1.275.338
EUR
|
1.223.290
EUR
|
1.250.339
EUR
|
1.237.941
EUR
|
— | — |
| Liabilities |
663,661
EUR
|
617,057
EUR
|
649,908
EUR
|
625,700
EUR
|
— | — |
| Net current assets (liabilities) [abstract] | ||||||
| Current assets |
243,822
EUR
|
225,060
EUR
|
217,133
EUR
|
205,028
EUR
|
— | — |
| Current liabilities |
313,464
EUR
|
280,347
EUR
|
225,304
EUR
|
207,213
EUR
|
— | — |
| Assets less current liabilities [abstract] |