Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2013		Apr. 30, 2013	Oct. 31, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 306,103		$ 350,235	$ 385,867
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	175,566
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	130,537
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	20,758
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	14,794
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	5,964
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	1,304
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	627
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	677
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	65,222	[1]
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	56,107	[1]
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	9,115	[1]
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	87,284
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	71,528
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	15,756
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	218,819
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	104,038
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 114,781

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