Non-controlling and Other Beneficial Interests (Tables)
6 Months Ended
Apr. 30, 2013
Non Controlling And Other Beneficial Interests Table [Abstract]  
Summary of net (income) loss attributable to non-controlling and other beneficial interest holders
   Three Months Ended  Six Months Ended
   April 30,  April 30,
(in thousands) 2013 2012  2013 2012
Consolidated sponsored funds$ (2,986)$ (1,182) $ (4,092)$ (2,328)
Majority-owned subsidiaries  (3,690)  (3,751)   (7,589)  (7,111)
Non-controlling interest value adjustments(1)  (666)  (1,097)   (11,313)  (9,199)
Consolidated CLO entity  (97)  (3,870)   3,233  (8,861)
Net income attributable to non-controlling and         
other beneficial interests$ (7,439)$ (9,900) $ (19,761)$ (27,499)
(1) Relates to non-controlling interests redeemable at other than fair value.