Leases - Additional Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($) lease	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) lease	Sep. 30, 2018 USD ($)
Lease Description
Number of non-cancelable operating leases, lessee (leases) | lease	13		13
Operating lease payments	$ 2,300	$ 2,100	$ 6,900	$ 6,200
Right of use asset	16,000		16,000
Operating lease liability	$ 17,216		$ 17,216
Weighted average operating lease term	7 years		7 years
Operating lease weighted average interest rate (percent)	4.40%		4.40%
Minimum
Lease Description
Lessor operating lease term	1 month		1 month
Maximum
Lease Description
Lessor operating lease term	6 months		6 months