Mortgage Loans Held For Investment And Related Assets (Schedule Of Allowance For Impaired 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 [Abstract]
Based on collateral value method	$ 1,756	$ 2,418	$ 2,583
Based on discounted cash flow method	4,237	4,346	4,598
Total allowance for loans	$ 5,993	$ 6,764	$ 7,181