Commitments and Contingencies - Future Minimum Payments (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Oct. 31, 2015
Operating leases
Total	$ 15,386
2018	4,879
2019	4,719
2020	4,754
2021	966
2022	68
More than 5 Years	0
Purchase commitments
Total	2,761
2018	741
2019	711	$ 600
2020	674
2021	635
2022	0
More than 5 Years	0
Capital leases
Total	205
2018	41
2019	41
2020	41
2021	41
2022	41
More than 5 years	0
Operating and capital leases and purchase commitments
Total operating and capital leases and purchase commitments	18,352
2018	5,661
2019	5,471
2020	5,469
2021	1,642
2022	109
More than 5 Years	$ 0