Interest Income And Interest Expense (Schedule Of Interest Income And Expense Of Continuing Operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2010
Schedule Of Interest Income And Expense [Line Items]
Interest income	$ 99,800	$ 133,660	$ 118,360
Interest expense	92,089	94,183	89,830
Mortgage Loans, Net [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest income	20,322	24,693	31,877
Emerald Advance Lines Of Credit [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest income	59,660	94,300	77,891
Investment Securities [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest income	4,463	1,609	2,318
Interest Income Other [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest income	15,355	13,058	6,274
Borrowings [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest expense	84,782	84,169	77,659
Deposits [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest expense	6,735	8,488	10,174
FHLB Advances [Member]
Schedule Of Interest Income And Expense [Line Items]
Interest expense	$ 572	$ 1,526	$ 1,997