Leases - Additional Information (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Lessee Lease Description [Line Items]
Operating leases, option to extend lease	The leases may include options to extend the lease periods for up to 5 years
Operating leases, existence of option to extend	true
Operating leases, option to terminate lease	options to terminate the leases within 1 year
Operating leases, existence of option to terminate	true
Operating leases, residual value guarantee description	The leases may include a residual value guarantee or a responsibility to return the property to its original state of use.
Operating leases, existence of residual value guarantee	true
Additional operating leases not yet commenced, value	$ 16.7
Minimum
Lessee Lease Description [Line Items]
Operating leases, remaining lease term	1 year
Additional operating leases not yet commenced, lease terms	1 year
Maximum
Lessee Lease Description [Line Items]
Operating leases, remaining lease term	9 years
Operating leases, extendable lease term	5 years
Operating leases, termination lease term	1 year
Additional operating leases not yet commenced, lease terms	8 years