Leases - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset	$ 19,647,000
Operating lease, liability	$ 21,730,000
Termination period	1 year
Finance lease, right-of-use asset	$ 1,037,000
Finance lease accumulated depreciation	300,000
Non-cancelable operating leases			$ 35,018,000
Non-cancelable finance leases			$ 1,303,000
Operating lease, right-of-use asset, not yet commenced	$ 0
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	6 years
Renewal term	5 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset		$ 22,800,000
Operating lease, liability		$ 23,900,000