Interest Income And Interest Expense (Schedule Of Interest Income And Expense Of Continuing Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015
Schedule Of Interest Income And Expense [Line Items]
Other Nonoperating Income	$ 3,055	$ 304	$ 13,993	$ 827
Interest expense on borrowings	(23,573)	(9,048)	(46,329)	(36,686)
Other income, net	(6,140)	(6,970)	(11,335)	(10,456)
Mortgage Loans, Net
Schedule Of Interest Income And Expense [Line Items]
Other Nonoperating Income	2,186	0	2,220	0
AFS Securities
Schedule Of Interest Income And Expense [Line Items]
Other Nonoperating Income	36	0	8,804	0
Other
Schedule Of Interest Income And Expense [Line Items]
Other Nonoperating Income	833	304	2,969	827
Borrowings
Schedule Of Interest Income And Expense [Line Items]
Interest expense on borrowings		(6,883)	(8,138)	(8,690)
Other income, net	(3,516)
Gain (Loss) on Investments [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest expense on borrowings		0	(2,500)	0
Other income, net	(2,500)
Deposits
Schedule Of Interest Income And Expense [Line Items]
Interest Expense, Deposits		$ (87)	$ (697)	$ (1,766)
Other income, net	$ (124)