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Commitments and Contingencies - Schedule of Minimum Future Volume Commitments (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 82,083
2020 74,523
2021 105,760
2022 96,693
2023 78,505
Thereafter 190,396
Future minimum volume commitment $ 627,960