Income Taxes (Schedule Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2021	Apr. 30, 2020	Apr. 30, 2019
CURRENT
Federal	$ 25,683	$ 29,072	$ 25,649
State	5,639	7,581	8,231
Foreign	1,018	533	1,125
Total current expense	32,340	37,186	35,005
DEFERRED
Federal	(11,426)	(7,167)	(4,498)
State	(2,039)	(4,190)	(3,266)
Deferred Foreign Income Tax Expense (Benefit)	(203)	(142)	(41)
Total deferred benefit	(13,668)	(11,499)	(7,805)
Total expense	18,672	25,687	27,200
Other comprehensive income (loss)	(1,156)	(573)	190
Total comprehensive income tax expense	$ 17,516	$ 25,114	$ 27,390