Non-Controlling and Other Beneficial Interests (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Non Controlling And Other Beneficial Interests Details [Abstract]
Consolidated sponsored funds	$ (1,727)	$ (493)	$ (1,712)	$ 16
Majority-owned subsidiaries	(3,932)	(3,206)	(7,650)	(6,516)
Non-controlling interest value adjustments	1	0	74	(133)
Consolidated CLO entities	0	(10,789)	0	(12,701)
Net income attributable to non-controlling and other beneficial interests	$ (5,658)	$ (14,488)	$ (9,288)	$ (19,334)