Financial instruments - Interest rate risk (Details) - Interest rate risk - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Financial debt bearing variable interest rate, not hedged
Financial risk management and financial instruments
Percentage increase in variable interest rate for sensitivity analysis	0.50%
Percentage effect on consolidated net income	1.00%
Percentage effect on equity	1.00%
Interest rate swap
Financial risk management and financial instruments
Notional amount	€ 0	€ 204,000
Interest rate pre-hedges
Financial risk management and financial instruments
Reserve of cash flow hedges	€ 9,249	€ 1,131

Percentage Impact in Equity Due to Reasonably Possible Increase in Risk Variable

No definition available.

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- Definition

The percentage impact in profit (loss) as a result of an increase in the relevant risk variable that was reasonably possible at the end of the reporting period.

+ References

No definition available.

+ Details

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- Definition

The reasonably possible percentage of increase in the relevant risk variable used to determine the financial impact in a sensitivity analysis.

+ References

No definition available.

+ Details

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2019-03-27

+ Details

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- Definition

A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_e&doctype=Standard
-URIDate 2019-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 9
-IssueDate 2019-01-01
-Paragraph 6.5.11
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2019-en-r&anchor=para_6.5.11&doctype=Standard
-URIDate 2019-03-27

+ Details

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- Details

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- Details

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