Income Taxes (Schedule Of Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017
CURRENT EXPENSE
Federal	$ 25,649	$ 8,668	$ 23,638
State	8,231	1,290	4,189
Foreign	1,125	257	0
Total current expense	35,005	10,215	27,827
DEFERRED EXPENSE
Federal	(4,498)	17,833	8,607
State	(3,266)	3,642	1,292
Deferred Foreign Income Tax Expense (Benefit)	(41)	(71)	0
Total deferred expense	(7,805)	21,404	9,899
Total expense	27,200	31,619	37,726
Other comprehensive income (loss)	190	50	4,391
Total comprehensive income tax expense	$ 27,390	$ 31,669	$ 42,117