Customer Banking Deposits (Components Of Banking Deposits) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2014	Apr. 30, 2013	Apr. 30, 2012
Short-term [Abstract]
Money-market deposits, Outstanding Balance	$ 24,870	$ 188,939
Savings deposits, Outstanding Balance	7,611	18,608
Interest-bearing checking deposits, Outstanding Balance	189	1,941
Non-interest-bearing checking deposits, Outstanding Balance	429,992	391,654
Checking deposits, Outstanding Balance	430,181	393,595
Due in one year, Outstanding Balance	3,054	18,529
IRAs, Outstanding Balance	304,069	316,793
IRAs and other time deposits, Outstanding Balance	307,123	335,322
Deposits, total	769,785	936,464
Money-market deposits, Interest Expense	1,228	1,827
Savings deposits, Interest Expense	66	138
Interest-bearing checking deposits, Interest Expense	7	21
Checking deposits, Interest Expense	7	21
IRAs and other time deposits, Interest Expense	808	3,674
Interest Expense, Deposits, total	2,109	5,660	6,735
Long-term [Abstract]
Due in two years	166	1,436
Due in three years	7	106
Due in four years	315	13
Due in five years	15	312
Long-term deposits	$ 503	$ 1,867