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Commitments and Contingencies - Future Minimum Annual Commitments (Details)
$ in Thousands
Dec. 31, 2019
USD ($)
Minimum Purchase Commitments  
2020 $ 14,512
2021 9,253
2022 6,900
2023 6,900
2024 3,593
Thereafter 2,490
Total future purchase commitments $ 43,648