Financing Arrangements (Details) $ in Thousands	3 Months Ended
	Apr. 30, 2020 USD ($) numberOfInstallmentPayments	Sep. 20, 2019 USD ($)
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
Proceeds from Lines of Credit	$ 50,000
Line of Credit Facility, Interest Rate at Period End	1.80%
Remaining borrowing capacity under the line of credit	$ 50,000
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	$ 364
Repayments of Lines of Credit	$ 0