Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) - USD ($) $ in Thousands		Apr. 30, 2016	Apr. 30, 2015
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 206,208	$ 245,216
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		122,044
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		84,164
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		12,090
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		9,775
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		2,315
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		507
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		376
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		131
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	46,865
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	40,987
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	5,878
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		59,462
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		51,138
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		8,324
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		146,746
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		70,906
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 75,840

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