Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Commitments And Contingencies [Line Items]
Lessee operating lease, expiration year			2028
Rent expense	$ 2.2	$ 2.0	$ 6.4	$ 5.6
Office Equipment
Commitments And Contingencies [Line Items]
Lessee operating lease, expiration year			2025