Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total	$ 55,036		$ 55,036		$ 44,557
Less: accumulated depreciation and amortization	(19,892)		(19,892)		(17,710)
Property and equipment, net	35,144		35,144		26,847
Depreciation and amortization	2,000	$ 1,300	4,000	$ 2,800
Computer software and equipment
Property, Plant and Equipment [Line Items]
Total	22,160		22,160		21,234
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total	6,200		6,200		4,504
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total	25,093		25,093		16,953
Right-of-use assets under finance leases
Property, Plant and Equipment [Line Items]
Total	$ 1,583		$ 1,583		$ 1,866