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Commitments and Contingencies - Aggregate Minimum Future Payments Required on Operating Leases (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Commitments and Contingencies Disclosure [Abstract]  
2019 $ 36,537
2020 39,059
2021 39,561
2022 39,585
2023 27,564
Thereafter 403,450
Total $ 585,756