Customer Banking Deposits (Components Of Banking Deposits) (Details) (USD $)	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Short-term [Abstract]
Money-market deposits, Outstanding Balance	$ 188,939,000	$ 177,976,000
Savings deposits, Outstanding Balance	18,608,000	11,401,000
Interest-bearing checking deposits, Outstanding Balance	1,941,000	4,336,000
Non-interest-bearing checking deposits, Outstanding Balance	391,654,000	276,321,000
Checking deposits, Outstanding Balance	393,595,000	280,657,000
Due in one year, Outstanding Balance	18,529,000	29,510,000
IRAs, Outstanding Balance	316,793,000	328,005,000
IRAs and other time deposits, Outstanding Balance	335,322,000	357,515,000
Deposits, total	936,464,000	827,549,000
Money-market deposits, Interest Expense	1,827,000	2,071,000
Savings deposits, Interest Expense	138,000	105,000
Interest-bearing checking deposits, Interest Expense	21,000	40,000
Checking deposits, Interest Expense	21,000	40,000
IRAs and other time deposits, Interest Expense	3,674,000	4,519,000
Interest Expense, Deposits, total	5,660,000	6,735,000
Long-term [Abstract]
Due in two years	1,436,000	4,710,000
Due in three years	106,000	706,000
Due in four years	13,000	36,000
Due in five years	312,000	46,000
Long-term deposits	1,867,000	5,498,000
Accrued interest on deposits	$ 100,000