Mortgage Loans Held For Investment And Related Assets (Schedule Of Non-Accrual Loans) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2014	Apr. 30, 2014	Oct. 31, 2013
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	$ 71,693	$ 74,295	$ 80,364
Financing receivable modifications to recorded investments	5,999	5,599	4,713
Total non-accrual loans	77,692	79,894	85,077
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	60,254	61,767	67,641
Financing receivable modifications to recorded investments	5,059	4,648	3,832
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Loans receivable recorded investment non-accrual status	11,439	12,528	12,723
Financing receivable modifications to recorded investments	$ 940	$ 951	$ 881