Mortgage Loans Held For Investment And Related Assets (Schedule Of Credit Quality Indicators) (Details) (USD $) In Thousands, unless otherwise specified	Apr. 30, 2013	Apr. 30, 2012
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 350,235	$ 429,312
Occupancy Status, Owner Occupied
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	241,414
Occupancy Status, Non-Owner Occupied
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	108,821
Documentation Level, Full Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	176,080
Documentation Level, Limited Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	22,427
Documentation Level, Stated Income
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	125,646
Documentation Level, No Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	26,082
Internal Risk Rating, High
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	62,459
Internal Risk Rating, Medium
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	135,745
Internal Risk Rating, Low
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	152,031
Purchased From SCC
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	198,204
Purchased From SCC | Occupancy Status, Owner Occupied
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	143,924
Purchased From SCC | Occupancy Status, Non-Owner Occupied
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	54,280
Purchased From SCC | Documentation Level, Full Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	65,176
Purchased From SCC | Documentation Level, Limited Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	6,640
Purchased From SCC | Documentation Level, Stated Income
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	109,740
Purchased From SCC | Documentation Level, No Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	16,648
Purchased From SCC | Internal Risk Rating, High
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	62,459
Purchased From SCC | Internal Risk Rating, Medium
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	135,745
Purchased From SCC | Internal Risk Rating, Low
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio
All Other
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	152,031
All Other | Occupancy Status, Owner Occupied
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	97,490
All Other | Occupancy Status, Non-Owner Occupied
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	54,541
All Other | Documentation Level, Full Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	110,904
All Other | Documentation Level, Limited Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	15,787
All Other | Documentation Level, Stated Income
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	15,906
All Other | Documentation Level, No Documentation
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	9,434
All Other | Internal Risk Rating, High
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio
All Other | Internal Risk Rating, Medium
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio
All Other | Internal Risk Rating, Low
Mortgage Loans Held For Investment And Related Assets [Line Items]
Total Portfolio	$ 152,031