Leases - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Option to terminate, term	1 year
Operating leases not yet commenced, office facilities, amount	$ 2.1
Minimum
Lessee, Lease, Description [Line Items]
Operating leases not yet commenced, term of contract (in years)	1 year
Maximum
Lessee, Lease, Description [Line Items]
Renewal option, term	25 years
Operating leases not yet commenced, term of contract (in years)	5 years