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Variable Interest Entities (Tables)
9 Months Ended
Jul. 31, 2013
Variable Interest Entities Disclosure Table [Abstract]  
Summary of the fair value of the CLO entity's assets and liabilities subject to fair value accounting
July 31, 2013       
   CLO Bank Loan Investments  
(in thousands)  Total CLO bank loan investments 90 days or more past due Senior and subordinated note obligations
Unpaid principal balance $241,835$908$311,580
Unpaid principal balance       
over fair value  (2,166) (570) (20,405)
Fair value $239,669$338$291,175

October 31, 2012       
   CLO Bank Loan Investments  
(in thousands)  Total CLO bank loan investments 90 days or more past due Senior and subordinated note obligations
Unpaid principal balance $425,153$500$471,546
Unpaid principal balance       
over fair value  (863) (485) (24,941)
Fair value $424,290$15$446,605
Summary of the carrying amounts related to a CLO entity consolidated on the Company's Balance Sheet
   July 31, October 31,
(in thousands)  2013 2012
Assets of consolidated CLO entity:       
Cash and cash equivalents  $ 58,300 $ 36,758
Bank loans and other investments    245,991   430,583
Other assets    2,237   1,107
Liabilities of consolidated CLO entity:       
Senior and subordinated note obligations    291,175   446,605
Other liabilities    421   766
Appropriated retained earnings    13,107  18,699
Net interest in consolidated CLO entity  $ 1,825 $ 2,378