Leases - Summary of Minimum Future Lease Payments (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Operating leases
2019	$ 3,430
2020	13,319
2021	12,920
2022	12,887
2023	12,450
Thereafter	8,605
Total	63,611
Less: imputed interest	(7,137)
Net lease obligation	56,474
Finance leases
2019	6,323
2020	24,933
2021	23,726
2022	17,326
2023	6,201
Thereafter	1,450
Total	79,959
Less: imputed interest	(7,948)
Net lease obligation	$ 72,011