Customer Banking Deposits (Components Of Banking Deposits) (Details) (USD $)	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Customer Banking Deposits [Abstract]
Money-market deposits, Outstanding Balance	$ 177,976,000	$ 164,734,000
Savings deposits, Outstanding Balance	11,401,000	11,030,000
Interest-bearing checking deposits, Outstanding Balance	4,336,000	6,947,000
Non-interest-bearing checking deposits, Outstanding Balance	276,321,000	279,296,000
Checking deposits, Outstanding Balance	280,657,000	286,243,000
Due in one year, Outstanding Balance	29,510,000	49,003,000
IRAs, Outstanding Balance	328,005,000	341,210,000
IRAs and other time deposits, Outstanding Balance	357,515,000	390,213,000
Deposits, total	827,549,000	852,220,000
Money-market deposits, Interest Expense	2,071,000	2,168,000
Savings deposits, Interest Expense	105,000	107,000
Interest-bearing checking deposits, Interest Expense	40,000	94,000
Checking deposits, Interest Expense	40,000	94,000
IRAs and other time deposits, Interest Expense	4,519,000	6,119,000
Interest Expense, Deposits, total	6,735,000	8,488,000
Due in two years	4,710,000	7,939,000
Due in three years	706,000	3,717,000
Due in four years	36,000	16,000
Due in five years	46,000	6,000
Long-term deposits	5,498,000	11,678,000
Accrued interest on deposits	$ 100,000	$ 200,000