Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) - USD ($) $ in Thousands		Oct. 31, 2015	Apr. 30, 2015	Oct. 31, 2014
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 226,224	$ 245,216	$ 258,728
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		134,036
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		92,188
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		12,016
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		8,803
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		3,213
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		1,281
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		1,082
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		199
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	49,715
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	43,608
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	6,107
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		63,012
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		53,493
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		9,519
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		163,212
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		80,543
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 82,669

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