Total revenues and other income - Summary of revenues (Details) - EUR (€) € in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Total revenues and other income
Recognition of non-refundable upfront payments and license fees	€ 196,487	€ 71,971	€ 30,257
Milestone payments	73,394	42,950	81,784
Reimbursement income	8,722	3,273	9,699
Other revenues	10,233	8,893	7,777
Total revenue	€ 288,836	€ 127,087	€ 129,519

The income arising in the course of an entity's ordinary activities. Income is increases in economic benefits during the accounting period in the form of inflows or enhancements of assets or decreases of liabilities that result in an increase in equity, other than those relating to contributions from equity participants.

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+ Details