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Variable Interest Entities (Tables)
3 Months Ended
Jan. 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
January 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$ 375,351$ 500$ 432,939
Excess unpaid principal       
balance over fair value  (984)  (485)  (21,356)
Fair Value$ 374,367$ 15$ 411,583

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
Excess 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
  January 31, October 31,
(in thousands) 2013 2012
Assets of consolidated CLO entity:      
Cash and cash equivalents $ 48,296 $ 36,758
Bank loans and other investments   380,672   430,583
Other assets   870   1,107
Liabilities of consolidated CLO entity:      
Senior and subordinated note obligations   411,583   446,605
Other liabilities   628   766
Appropriated retained earnings   15,369   18,699
Net interest in consolidated CLO entity $ 2,258 $ 2,378