Property and Equipment, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total	$ 49,948		$ 44,557
Less: accumulated depreciation and amortization	(19,414)		(17,710)
Property and equipment, net	30,534		26,847
Depreciation and amortization	2,000	$ 1,500
Computer software and equipment
Property, Plant and Equipment [Line Items]
Total	21,763		21,234
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total	4,618		4,504
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total	21,701		16,953
Right-of-use assets under finance leases
Property, Plant and Equipment [Line Items]
Total	$ 1,866		$ 1,866