Leases - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019 USD ($) lease	Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Leases
Lessee, Operating Lease, Term of Contract	11 years
Number of Leases | lease	4
Lessee, Operating Lease, Existence of Option to Extend	true
Operating Lease, Right-of-Use Asset	$ 6,481		$ 0
Operating Lease, initial right-of-use asset	8,100
Operating Lease, Payments	2,300
Operating Lease, Cost	$ 2,300	$ 2,300