Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	24.00%	24.30%	24.20%	24.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%	21.00%
Income Taxes (Textual) [Abstract]
Time Period Over Which it is Reasonably Possible That Company Could Increase or Decrease its Unrecognized Tax Benefits			12 months
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 2.6		$ 2.6