Leases - Narrative (Details) $ in Thousands	9 Months Ended
	Oct. 31, 2021 USD ($) ft²
Lessee, Lease, Description [Line Items]
Total minimum payments	$ 69,438
NY Office Lease
Lessee, Lease, Description [Line Items]
Rentable office space (in sqft) | ft²	106,230
Term of contract	12 years
Total minimum payments	$ 87,300
Financing lease renewal term	5 years
Palo Alto
Lessee, Lease, Description [Line Items]
Area of leased space (in sq ft) | ft²	16,000
Operating lease, term of contract	8 years
Operating lease renewal term	5 years
Lease not yet commenced, estimated base rent payments	$ 14,200