Transactions with Related Parties - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Related Party Transactions [Abstract]
Lease expiration date	Nov. 30, 2032
Lease extension options	two five-year
Amount incurred for leased office space	$ 2.1	$ 2.6	$ 2.5