Mortgage Loans Held For Investment And Related Assets (Schedule Of Past Due Mortgage Loans) (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2013		Apr. 30, 2013	Jul. 31, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 322,454		$ 350,235	$ 405,670
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	183,551
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	138,903
Less than 60 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	17,156
Less than 60 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	11,890
Less than 60 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	5,266
60 – 89 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	2,724
60 – 89 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	2,724
60 – 89 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	0
90 Days Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	73,548	[1]
90 Days Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	61,237	[1]
90 Days Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	12,311	[1]
Total Past Due
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	93,428
Total Past Due | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	75,851
Total Past Due | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	17,577
Current
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	229,026
Current | Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	107,700
Current | All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 121,326

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