Mortgage Loans Held For Investment And Related Assets (Schedule Of Non-Accrual Loans) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	$ 74,295	$ 85,233
Financing receivable modifications to recorded investments	5,599	4,221
Total non-accrual loans	79,894	89,454
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	61,767	70,327
Financing receivable modifications to recorded investments	4,648	3,719
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	12,528	14,906
Financing receivable modifications to recorded investments	$ 951	$ 502