Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014		Apr. 30, 2013	Jan. 31, 2013
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 291,325		$ 350,235	$ 372,139
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	166,265
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	125,060
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	20,775
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	14,721
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	6,054
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	1,360
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	923
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	437
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	60,578	[1]
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	51,663	[1]
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	8,915	[1]
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	82,713
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	67,307
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	15,406
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	208,612
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	98,958
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 109,654

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