Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) - USD ($) $ in Thousands		Jul. 31, 2016	Apr. 30, 2016	Jul. 31, 2015
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 196,074	$ 206,208	$ 235,848
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		116,489
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		79,585
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		10,306
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		8,849
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		1,457
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		1,094
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		745
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		349
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	43,739
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	38,503
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	5,236
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		55,139
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		48,097
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		7,042
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		140,935
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		68,392
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 72,543

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