Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Leases [Abstract]
Lease right-of-use assets	$ 49,640	$ 56,917
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Lease liabilities	Lease liabilities
Lease liabilities	$ 10,981	$ 11,347
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Lease liabilities, noncurrent	Lease liabilities, noncurrent
Lease liabilities, noncurrent	$ 43,607	$ 51,393
Total operating lease liabilities	$ 54,588	$ 62,740
Weighted Average Remaining Lease Term	6 years	6 years 8 months 12 days
Weighted Average Discount Rate	3.70%	3.80%