Notes to income statement - Income tax expense (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Analysis of income and expense [abstract]
Current tax expense (income) and adjustments for current tax of prior periods	€ (24,167)	€ (18,678)	€ (21,440)
(thereof income taxes attributable to the prior year)	1,769	155	6,751
Deferred taxes	3,430	(4,562)	(2,398)
(thereof on temporary differences)	1,356	(4,241)	6,739
Total net tax expenses from continuing activities	(20,737)	(23,240)	(23,838)
Tax expense recognized directly in equity	€ (6,886)	€ 6,551	€ 4,696

Adjustments of tax expense (income) recognised in the period for current tax of prior periods.

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The aggregate current and deferred tax relating to particular items that are charged or credited directly to equity, for example: (a) an adjustment to the opening balance of retained earnings resulting from either a change in accounting policy that is applied retrospectively or the correction of an error; and (b) amounts arising on initial recognition of the equity component of a compound financial instrument. [Refer: Deferred tax relating to items credited (charged) directly to equity; Retained earnings; Financial instruments, class [member]]

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