Financing Arrangements (Details) $ in Thousands, $ in Thousands	6 Months Ended
	Jul. 31, 2020 USD ($) numberOfInstallmentPayments	Jul. 31, 2019 USD ($)	Jul. 31, 2020 CAD ($)	Sep. 20, 2019 USD ($)
Line of Credit Facility [Line Items]
Repayments of debt	$ 50,000	$ 0
Bank of America [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Initiation Date	Sep. 20, 2019
Borrowing capacity under line of credit				$ 100,000
Maturity date of the line of credit	Sep. 20, 2022
Remaining borrowing capacity under the line of credit	$ 100,000
WEDC [Member]
Line of Credit Facility [Line Items]
Borrowing capacity under line of credit			$ 5,000
Number of Monthly installments to pay | numberOfInstallmentPayments	60
Interest rate at a future date	3.00%
Other Long-term Debt	$ 378
Repayments of debt	$ 0