Interest Income And Interest Expense (Schedule Of Interest Income And Expense Of Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Schedule Of Interest Income And Expense [Line Items]
Other income (expense), net	$ 1,220	$ 2,641
Mortgage loans and real estate owned, net
Schedule Of Interest Income And Expense [Line Items]
Other income (expense), net	0	1,537
Interest income
Schedule Of Interest Income And Expense [Line Items]
Other income (expense), net	1,362	1,066
Interest and gains on available-for-sale (AFS) securities
Schedule Of Interest Income And Expense [Line Items]
Other income (expense), net	82	31
Foreign currency gains (losses), net
Schedule Of Interest Income And Expense [Line Items]
Other income (expense), net	131	(21)
Other, net
Schedule Of Interest Income And Expense [Line Items]
Other income (expense), net	$ (355)	$ 28