Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Operating leases:
Operating lease right-of-use assets, net	$ 51,604	$ 58,758
Operating lease liabilities, current	18,109	18,437
Operating lease liabilities, non-current	61,882	$ 70,481
Total operating lease liabilities	$ 79,991
Weighted average remaining lease term (in years)	6 years 6 months
Weighted average discount rate	6.80%