Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Apr. 30, 2014	Apr. 30, 2013
Cash Flows From Operating Activities:
Net income	$ 154,777	$ 133,247
Adjustments to reconcile net income to net cash used for operating activities:
Depreciation and amortization	11,096	11,610
Amortization of deferred sales commissions	9,366	9,591
Stock-based compensation	29,489	26,884
Deferred income taxes	11,123	(1,755)
Net (gains) losses on investments and derivatives	2,909	(6,226)
Equity in net income of affiliates, net of amortization	(10,422)	(8,127)
Dividends received from affiliates	8,338	10,163
Consolidated CLO entities' operating activities:
Net (gains) losses on bank loans, other investments and note obligations	(853)	2,739
Amortization	(665)	(403)
Net decrease in other assets and liabilities, including cash	(140,520)	(29,244)
Changes in operating assets and liabilities:
Investment advisory fees and other receivables	(2,112)	(13,692)
Investments in trading securities	(178,504)	(127,402)
Deferred sales commissions	(8,116)	(9,516)
Other assets	8,054	32,715
Accrued compensation	(72,785)	(60,286)
Accounts payable and accrued expenses	8,507	(3,443)
Other liabilities	15,051	(18,947)
Net cash used for operating activities	(155,267)	(52,092)
Cash Flows From Investing Activities:
Additions to equipment and leasehold improvements	(4,226)	(2,158)
Net cash paid in acquisition	0	(86,429)
Cash paid for intangible assets	0	(300)
Proceeds from sales of investments	63,843	63,184
Purchase of investments	(20,813)	(662)
Consolidated CLO entities' investing activities:
Proceeds from sales and maturities of bank loans and other investments	332,652	199,601
Purchase of bank loans and other investments	(247,649)	(85,412)
Net cash provided by investing activities	123,807	87,824
Cash Flows From Financing Activities:
Purchase of additional non-controlling interest	(26,872)	(43,507)
Proceeds from issuance of subsidiary equity	0	1,092
Proceeds from issuance of Voting Common Stock	59	0
Proceeds from issuance of Non-Voting Common Stock	32,454	86,536
Repurchase of Voting Common Stock	(77)	(73)
Repurchase of Non-Voting Common Stock	(135,333)	(22,723)
Principal repayments on notes receivable from stock option exercises	1,570	1,611
Excess tax benefit of stock option exercises	11,206	13,118
Dividends paid	(53,566)	(166,980)
Net subscriptions received from (redemptions/distributions paid to) non-controlling interest holders	(5,310)	37,189
Consolidated CLO entities' financing activities:
Repayment of line of credit	(247,789)	0
Repayment of redeemable preferred shares	(60,000)	0
Issuance of senior and subordinated notes and preferred shares	429,582	0
Principal repayments of senior note obligations	(63,780)	(83,742)
Net cash used for financing activities	(117,856)	(177,479)
Effect of currency rate changes on cash and cash equivalents	(651)	(194)
Net decrease in cash and cash equivalents	(149,967)	(141,941)
Cash and cash equivalents, beginning of period	461,906	462,076
Cash and cash equivalents, end of period	311,939	320,135
Supplemental Cash Flow Information:
Cash paid for interest	13,916	16,478
Cash paid for interest by consolidated CLO entities	4,094	7,920
Cash paid for income taxes, net of refunds	51,609	61,016
Supplemental Disclosure of Non-Cash Information:
Increase in equipment and leasehold improvements due to non-cash additions	28	0
Exercise of stock options through issuance of notes receivable	1,922	4,734
Acquisition of non-controlling interests through issuance of subsidiary equity	9,935	0
Deconsolidations of Sponsored Investment Funds:
Decrease in investments	(776)	(14,461)
Decrease in non-controlling interests	$ (745)	$ (13,969)