Commitments and Contingencies (Details) - Charitable Gift [Member] $ in Thousands	3 Months Ended
	Apr. 30, 2020 USD ($)
Loss Contingencies [Line Items]
Long-term Purchase Commitment, Amount	$ 5,000
Loss Contingency Accrual	2,631
Cumulative Loss Contingency Accrual, Payments	2,145
Accrued Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency, Accrual, Current	697
Other Noncurrent Liabilities [Member]
Loss Contingencies [Line Items]
Loss Contingency, Accrual, Noncurrent	$ 1,934