Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Lessee Lease Description [Line Items]
Option to extend, existence, operating lease	true
Operating leases rent expense		$ 1.2
Minimum [Member]
Lessee Lease Description [Line Items]
Operating leases, options to extend leases term	1 year
Maximum [Member]
Lessee Lease Description [Line Items]
Operating leases, options to extend leases term	5 years