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	3 Months Ended		12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Apr. 30, 2013
Mortgage Loans Held For Investment And Related Assets [Line Items]
Outstanding Principal Balance	$ 322,454	$ 405,670	$ 350,235
Loan Loss Allowance, Amount	15,514	22,185	14,314
Loan Loss Allowance, % of Principal	4.80%	5.50%	4.10%
% 30 Days Past Due	22.60%
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Outstanding Principal Balance	183,551
Loan Loss Allowance, Amount	11,912
Loan Loss Allowance, % of Principal	6.50%
% 30 Days Past Due	32.70%
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Outstanding Principal Balance	138,903
Loan Loss Allowance, Amount	$ 3,602
Loan Loss Allowance, % of Principal	2.60%
% 30 Days Past Due	9.20%