Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) - USD ($) $ in Thousands		Jan. 31, 2016	Apr. 30, 2015	Jan. 31, 2015
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 217,249	$ 245,216	$ 252,965
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		129,509
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		87,740
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		11,797
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		9,148
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		2,649
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		491
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		440
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		51
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	49,734
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	43,428
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	6,306
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		62,022
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		53,016
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		9,006
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		155,227
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		76,493
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 78,734

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