Debt and Financing Lease Obligations - Debt Covenants (Details) $ in Millions	3 Months Ended
	Apr. 30, 2020 USD ($)
Debt Disclosure [Abstract]
Debt Instrument, Minimum Interest Coverage Ratio	1.00
Debt Instrument, Minimum Interest Coverage Ratio, Trailing Two Quarters	1.50
Determination period	12 months
Actual
Leverage Ratio must not exceed (maximum)	2.31
ABS Excluded Leverage Ratio must not exceed (maximum)	1.20
Capital Expenditures, net, must not exceed (maximum)	$ 35.3
Required Minimum/ Maximum
Leverage Ratio must not exceed (maximum)	4.00
ABS Excluded Leverage Ratio must not exceed (maximum)	2.00
Capital Expenditures, net, must not exceed (maximum)	$ 100.0