Leases - Schedule of Maturities of Operating Lease Liabilities and Sublease Income (Details) $ in Thousands	Jun. 30, 2019 USD ($)
Operating Leases Payments
Remainder of 2019	$ 6,644
2020	12,950
2021	12,568
2022	12,902
2023	12,992
Thereafter	68,897
Gross lease payments (income)	126,953
Less: Imputed interest	37,280
Operating lease liabilities	89,673
Sublease Income
Remainder of 2019	(2,346)
2020	(2,893)
2021	(2,535)
2022	(336)
2023	0
Thereafter	0
Gross lease payments (income)	$ (8,110)