Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Lessee Lease Description [Line Items]
Option to extend, existence, operating lease			true
Lease costs	$ 1.5		$ 2.9
Operating leases rent expense		$ 1.2		$ 2.4
Minimum [Member]
Lessee Lease Description [Line Items]
Operating leases, options to extend leases term	1 year		1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating leases, options to extend leases term	5 years		5 years