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Mortgage Loans Held For Investment And Related Assets (Schedule Of Credit Quality Indicators) (Details) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2014
Apr. 30, 2014
Oct. 31, 2013
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio $ 258,728 $ 277,423 $ 306,103
Occupancy Status, Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 181,836    
Occupancy Status, Non-Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 76,892    
Documentation Level, Full Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 127,131    
Documentation Level, Limited Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 16,790    
Documentation Level, Stated Income
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 95,379    
Documentation Level, No Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 19,428    
Internal Risk Rating, High
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 41,758    
Internal Risk Rating, Medium
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 107,075    
Internal Risk Rating, Low
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 109,895    
Purchased From SCC
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 148,833    
Purchased From SCC | Occupancy Status, Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 109,069    
Purchased From SCC | Occupancy Status, Non-Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 39,764    
Purchased From SCC | Documentation Level, Full Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 49,157    
Purchased From SCC | Documentation Level, Limited Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 4,676    
Purchased From SCC | Documentation Level, Stated Income
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 83,074    
Purchased From SCC | Documentation Level, No Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 11,926    
Purchased From SCC | Internal Risk Rating, High
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 41,758    
Purchased From SCC | Internal Risk Rating, Medium
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 107,075    
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 109,895    
All Other | Occupancy Status, Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 72,767    
All Other | Occupancy Status, Non-Owner Occupied
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 37,128    
All Other | Documentation Level, Full Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 77,974    
All Other | Documentation Level, Limited Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 12,114    
All Other | Documentation Level, Stated Income
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 12,305    
All Other | Documentation Level, No Documentation
      
Mortgage Loans Held For Investment And Related Assets [Line Items]      
Total Portfolio 7,502    
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 $ 109,895