Mortgage Loans Held For Investment And Related Assets (Schedule Of Non-Accrual Loans) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	$ 85,233	$ 104,973
Financing receivable modifications to recorded investments	4,221	4,436
Total non-accrual loans	89,454	109,409
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	70,327	88,347
Financing receivable modifications to recorded investments	3,719	3,166
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	14,906	16,626
Financing receivable modifications to recorded investments	$ 502	$ 1,270