Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment
Cash, cash equivalents, and restricted cash	$ 26,978		$ 18,286	$ 26,862	$ 22,978
Right Of Use Asset	25,251	$ 25,600
Lease Liability	$ 27,854	$ 27,800
Minimum
Property, Plant and Equipment
Duration of lease renewal terms	1 year
Maximum
Property, Plant and Equipment
Duration of lease renewal terms	5 years
Equipment and computers | Minimum
Property, Plant and Equipment
Useful lives (in years)	3 years
Equipment and computers | Maximum
Property, Plant and Equipment
Useful lives (in years)	5 years
Furniture and fixtures
Property, Plant and Equipment
Useful lives (in years)	5 years
Building improvements and leasehold improvements | Maximum
Property, Plant and Equipment
Useful lives (in years)	10 years