Mortgage Loans Held For Investment And Related Assets (Schedule Of Mortgage Loans Held For Investment And The Related Allowance) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]
Outstanding Principal Balance	$ 350,235	$ 429,312
Loan Loss Allowance, Amount	14,314	26,540
Loan Loss Allowance, % of Principal	4.10%	6.20%
% 30 Days Past Due	23.10%
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Outstanding Principal Balance	198,204
Loan Loss Allowance, Amount	10,926
Loan Loss Allowance, % of Principal	5.50%
% 30 Days Past Due	33.70%
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Outstanding Principal Balance	152,031
Loan Loss Allowance, Amount	$ 3,388
Loan Loss Allowance, % of Principal	2.20%
% 30 Days Past Due	9.30%