Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013		Apr. 30, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 350,235		$ 429,312
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	198,204
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	152,031
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	20,494
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	14,778
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	5,716
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	4,841
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	2,765
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	2,076
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	75,216	[1]
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	63,421	[1]
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	11,795	[1]
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	100,551
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	80,964
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	19,587
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	249,684
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	117,240
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 132,444

[1] We do not accrue interest on loans past due 90 days or more.