Leases - Maturities of Operating Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating Lease Liabilities, Payments Due [Abstract]
2019	$ 2,123
2020	8,376
2021	8,183
2022	6,368
2023	6,013
Thereafter	17,145
Total lease payments	48,208
Less imputed interest	(5,585)
Total operating liabilities	$ 42,623