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Leases - Maturity of lease liabilities (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 7,684
2021 6,246
2022 3,960
2023 2,923
2024 2,478
Thereafter 2,042
Total lease payments 25,333
Less: Interest (2,124)
Present value of operating lease liabilities $ 23,209