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Goodwill and other intangible assets Future amortization expense (Details 3)
$ in Thousands
Dec. 31, 2020
USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2021 $ 4,911
2022 4,394
2023 4,121
2024 3,799
2025 1,862
Thereafter $ 6,409