Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) - USD ($) $ in Thousands		Oct. 31, 2016	Apr. 30, 2016	Oct. 31, 2015
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 187,057	$ 206,208	$ 226,224
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		111,533
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		75,524
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		7,821
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		6,350
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		1,471
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		2,142
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		1,714
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		428
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	42,677
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	38,057
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	[1]	4,620
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		52,640
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		46,121
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		6,519
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		134,417
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		65,412
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio		$ 69,005

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