Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	27.70%	22.70%	25.50%	24.00%
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	$ 1.8		$ 1.8