Income Taxes	3 Months Ended
Jul. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	9. Income Taxes The Company ordinarily computes its tax provision for interim reporting periods using an estimated annual effective tax rate in accordance with ASC 740-270. For the three months ended July 31, 2020, however, the Company determined that a reliable estimate of the annual effective tax rate could not be made because small changes in projected income produced significant variations in the estimated annual effective rate. Thus, for the three months ended July 31, 2020, the actual effective tax rate for the period was used as the best estimate of the annual effective tax rate. The provision for income tax was a benefit of $8.7 million in the three months ended July 31, 2020, compared to an expense of $14.5 million in the three months ended July 31, 2019. This reflects a 21.9% and 24.9% effective tax rate for the three months ended July 31, 2020 and 2019, respectively. The variability in effective tax rate over time is primarily due to the impact of U.S. state income taxes and the jurisdictional mix of earnings.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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