Leases - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating leases	5 years
Renewal term	5 years
Termination option	1 year
Operating lease not yet commenced, liability	$ 11.8
Minimum
Lessee, Lease, Description [Line Items]
Operating leases	1 year
Operating lease not yet commenced, term of contract	5 years
Maximum
Lessee, Lease, Description [Line Items]
Operating leases	8 years
Operating lease not yet commenced, term of contract	7 years