Statement Of Cash Flows [Abstract]
| Concept |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||||||
| Profit (loss) | — |
24,865,000
EUR
|
24,174,000
EUR
|
24,174,000
EUR
|
24,865,000
EUR
|
— |
941,000
EUR
|
941,000
EUR
|
— |
941,000
EUR
|
0
EUR
|
585,000
EUR
|
— |
585,000
EUR
|
— | — |
| Adjustments to reconcile profit (loss) [abstract] | ||||||||||||||||
| Adjustments for income tax expense | — |
523,000
EUR
|
21,000
EUR
|
— | — | — | — | — | — |
1,721,000
EUR
|
— | — | — |
1,271,000
EUR
|
— | — |
| Adjustments for finance costs | — |
10,173,000
EUR
|
18,501,000
EUR
|
— | — | — | — | — | — |
13,843,000
EUR
|
— | — | — |
38,457,000
EUR
|
— | — |
| Adjustments for decrease (increase) in inventories | — |
5,421,000
EUR
|
4,867,000
EUR
|
— | — | — | — | — | — |
349,000
EUR
|
— | — | — |
301,000
EUR
|
— | — |
| Adjustments for depreciation and amortisation expense | — |
167,279,000
EUR
|
137,351,000
EUR
|
— | — | — | — | — | — |
173,791,000
EUR
|
— | — | — |
141,651,000
EUR
|
— | — |
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss | — |
222,000
EUR
|
59,000
EUR
|
— | — | — | — | — | — |
0
EUR
|
— | — | — |
0
EUR
|
— | — |
| Adjustments for provisions | — |
1,538,000
EUR
|
1,546,000
EUR
|
— | — | — | — | — | — |
1,241,000
EUR
|
— | — | — |
707,000
EUR
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
848,000
EUR
|
0
EUR
|
— | — | — | — | — | — |
56,000
EUR
|
— | — | — |
0
EUR
|
— | — |
| Cash flows from (used in) operating activities | — |
220,750,000
EUR
|
202,093,000
EUR
|
— | — | — | — | — | — |
215,441,000
EUR
|
— | — | — |
147,456,000
EUR
|
— | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
5,000,000
EUR
|
5,000,000
EUR
|
— | — | — | — | — | — |
37,593,000
EUR
|
— | — | — |
37,593,000
EUR
|
— | — |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
0
EUR
|
0
EUR
|
— | — | — | — | — | — |
0
EUR
|
— | — | — |
18,060,000
EUR
|
— | — |
| Proceeds from sales of property, plant and equipment, classified as investing activities | — |
322,000
EUR
|
322,000
EUR
|
— | — | — | — | — | — |
1,721,000
EUR
|
— | — | — |
1,659,000
EUR
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
97,475,000
EUR
|
89,013,000
EUR
|
— | — | — | — | — | — |
92,887,000
EUR
|
— | — | — |
84,549,000
EUR
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
62,798,000
EUR
|
63,464,000
EUR
|
— | — | — | — | — | — |
77,110,000
EUR
|
— | — | — |
33,756,000
EUR
|
— | — |
| Dividends received, classified as investing activities | — |
6,000
EUR
|
840,000
EUR
|
— | — | — | — | — | — |
159,000
EUR
|
— | — | — |
159,000
EUR
|
— | — |
| Interest received, classified as investing activities | — |
1,000
EUR
|
2,420,000
EUR
|
— | — | — | — | — | — |
8,000
EUR
|
— | — | — |
2,989,000
EUR
|
— | — |
| Cash flows from (used in) investing activities | — |
154,710,000
EUR
|
136,803,000
EUR
|
— | — | — | — | — | — |
130,536,000
EUR
|
— | — | — |
91,326,000
EUR
|
— | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||||||
| Payments from changes in ownership interests in subsidiaries that do not result in loss of control | — |
0
EUR
|
0
EUR
|
— | — | — | — | — | — |
17,607,000
EUR
|
— | — | — |
0
EUR
|
— | — |
| Payments of lease liabilities, classified as financing activities | — |
9,819,000
EUR
|
9,113,000
EUR
|
— | — | — | — | — | — |
10,896,000
EUR
|
— | — | — |
9,829,000
EUR
|
— | — |
| Dividends paid, classified as financing activities | — |
22,769,000
EUR
|
22,769,000
EUR
|
— | — | — | — | — | — |
29,275,000
EUR
|
— | — | — |
29,275,000
EUR
|
— | — |
| Interest paid, classified as financing activities | — |
8,747,000
EUR
|
8,750,000
EUR
|
— | — | — | — | — | — |
9,012,000
EUR
|
— | — | — |
8,866,000
EUR
|
— | — |
| Cash flows from (used in) financing activities | — |
71,136,000
EUR
|
64,401,000
EUR
|
— | — | — | — | — | — |
82,429,000
EUR
|
— | — | — |
57,047,000
EUR
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — |
44,000
EUR
|
44,000
EUR
|
— | — | — | — | — | — |
59,000
EUR
|
— | — | — |
59,000
EUR
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
5,096,000
EUR
|
889,000
EUR
|
— | — | — | — | — | — |
2,476,000
EUR
|
— | — | — |
917,000
EUR
|
— | — |
| Cash and cash equivalents |
8,167,000
EUR
|
— | — | — | — |
2,086,000
EUR
|
— | — |
1,153,000
EUR
|
— | — | — |
13,219,000
EUR
|
— |
10,684,000
EUR
|
2,011,000
EUR
|