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Rialto Investments Segment (Accretable Yield For The FDIC Portfolios And Bank Portfolios) (Details) (Rialto Investments [Member], FDIC Portfolios And Bank Portfolios [Member], USD $)
In Thousands, unless otherwise specified
6 Months Ended
May 31, 2013
May 31, 2012
Rialto Investments [Member] | FDIC Portfolios And Bank Portfolios [Member]
   
Segment Reporting Information [Line Items]    
Accretable yield, beginning of period $ 112,899 $ 209,480
Additions 40,879 8,423
Deletions (22,463) (23,256)
Accretions (26,596) (40,890)
Accretable yield, end of period $ 104,719 $ 153,757