Non-Controlling and Other Beneficial Interests (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2012	Apr. 30, 2011
Non Controlling And Other Beneficial Interests Details [Abstract]
Consolidated funds	$ (1,182)	$ (3,323)	$ (2,328)	$ (4,659)
Majority-owned subsidiaries	(3,751)	(3,092)	(7,111)	(5,936)
Consolidated CLO entity	(3,870)	18,004	(8,861)	18,631
Non-controlling interest value adjustments	(1,097)	(2,875)	(9,199)	(21,072)
Net (income) loss attributable to non-controlling interests and other beneficial interests	$ (9,900)	$ 8,714	$ (27,499)	$ (13,036)