Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Lessee, Operating Lease, Description [Abstract]
Option to extend	true
Lessee, operating lease, option to terminate	The exercise of lease renewal options is generally at the Company’s sole discretion. The exercise of lease termination options is generally by mutual agreement between the Company and the lessor.
Variable and short term cost	$ 3.4	$ 3.3
Minimum
Lessee, Operating Lease, Description [Abstract]
Operating lease, contract term	1 year
Renewal term	1 year
Maximum
Lessee, Operating Lease, Description [Abstract]
Operating lease, contract term	10 years
Renewal term	10 years