Non-controlling and Other Beneficial Interests (Tables)
 12 Months Ended
Oct. 31, 2012
Non Controlling And Other Beneficial Interests Table [Abstract]  
Summary of net (income) loss attributable to non-controlling and other beneficial interests
 (in thousands) 2012 2011 2010
 Consolidated funds$ (4,353)$ (5,319)$ (209)
 Majority-owned subsidiaries  (14,518)  (11,670)  (8,333)
 Non-controlling interest value adjustments(1)  (19,866)  (30,216)  (18,385)
 Consolidated CLO entity  (22,566)  34,533  -
 Net income attributable to non-controlling and      
  other beneficial interests$ (61,303)$ (12,672)$ (26,927)
         
 (1) Relates to non-controlling interests redeemable at other than fair value.