Commitments and Contingencies - Summary of Future Minimum Payments (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Facility Leases
2019, excluding the nine months ended September 30, 2019	$ 2,013
2020	14,437
2021	14,111
2022	13,409
2023 and thereafter	40,290
Total lease payments	84,260
Other Commitments
2019, excluding the nine months ended September 30, 2019	26,796
2020	3,726
2021	1,173
2022	1,138
2023 and thereafter	0
Total minimum lease payments	$ 32,833