Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||
| Statement of changes in equity [line items] | |||||||||||||
| Increase (decrease) through change in equity of subsidiaries, equity |
65,000
EUR
|
— | — |
667,000
EUR
|
732,000
EUR
|
667,000
EUR
|
12,677,000
EUR
|
13,968,000
EUR
|
774,000
EUR
|
2,404,000
EUR
|
11,564,000
EUR
|
339,000
EUR
|
— |
| Increase (decrease) through transfer between revaluation surplus and retained earnings, equity |
EUR
|
— |
185,000
EUR
|
EUR
|
EUR
|
185,000
EUR
|
286,000
EUR
|
EUR
|
— |
EUR
|
EUR
|
286,000
EUR
|
— |
| Increase (decrease) through transactions with owners, equity |
1,072,000
EUR
|
676,000
EUR
|
— |
13,986,000
EUR
|
15,058,000
EUR
|
14,662,000
EUR
|
1,207,000
EUR
|
838,000
EUR
|
774,000
EUR
|
1,908,000
EUR
|
1,070,000
EUR
|
339,000
EUR
|
1,250,000
EUR
|
| Purchase of treasury shares | — | — | — | — | — | — | — |
166,000
EUR
|
— |
EUR
|
166,000
EUR
|
— |
166,000
EUR
|