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Intangible assets and goodwill - Future Amortization (Details)
$ in Thousands
Sep. 30, 2020
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2020 $ 9,627
2021 38,506
2022 38,506
2023 38,506
2024 and thereafter 10,891
Total $ 136,036