Leases - Narrative (Details) - USD ($)	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Jan. 31, 2022
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	6 years 8 months 12 days		6 years 10 months 24 days
Weighted average discount rate	2.37%		2.46%
Operating lease minimum payments, executed leases that have not commenced	$ 2,000,000
Public income remaining lease term	9 years 6 months
Facility Closure
Lessee, Lease, Description [Line Items]
Asset impairment charges	$ 2,000,000	$ 0
Minimum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	1 year
Lease renewal term	1 year
Optional termination period	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease remaining lease term	68 years
Lease renewal term	10 years
Optional termination period	8 years