Commitments and Contingencies - Future Minimum Operating Lease and Other Non-Cancellable Agreement Payments (Details) $ in Thousands	Jan. 31, 2018 USD ($)
Operating Leases
2019	$ 8,420
2020	6,641
2021	10,930
2022	9,658
2023	9,630
Thereafter	62,681
Total minimum payments	107,960
Other Obligations
2019	13,921
2020	12,222
2021	11,187
2022	0
2023	0
Thereafter	0
Total minimum payments	$ 37,330