Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jan. 31, 2013	Jan. 31, 2012
Cash Flows From Operating Activities:
Net income	$ 62,127	$ 64,870
Adjustments to reconcile net income to net cash used for operating activities:
Depreciation and amortization	5,736	6,314
Amortization of deferred sales commissions	4,801	5,827
Stock-based compensation	14,023	16,342
Deferred income taxes	(192)	(3,821)
Net gains on investments and derivatives	(4,751)	(6,430)
Equity in net income of affiliates, net of amortization	(3,859)	(2,417)
Dividends received from affiliates	3,092	10,225
Consolidated CLO entity operating activities:
Net losses (gains) on bank loans, other investments and note obligations	3,052	(4,736)
Amortization of investments	(201)	(256)
Net (decrease) increase in other assets and liabilities, including cash	(11,438)	2,771
Changes in operating assets and liabilities:
Investment advisory fees and other receivables	(8,941)	3,785
Investments in trading securities	(40,908)	(70,263)
Deferred sales commissions	(4,207)	(2,322)
Other assets	(7,167)	3,964
Accrued compensation	(86,898)	(87,633)
Accounts payable and accrued expenses	(2,251)	9,647
Other liabilities	5,776	45,918
Net cash used for operating activities	(72,206)	(8,215)
Cash Flows From Investing Activities:
Additions to equipment and leasehold improvements	(1,002)	(1,486)
Net cash paid in acquisition	(81,269)	0
Proceeds from sales of investments	44,102	14,542
Purchase of investments	(344)	(6,126)
Consolidated CLO entity investing activities:
Proceeds from sales and maturities of bank loans and other investments	74,972	32,512
Purchase of bank loans and other investments	(24,327)	(35,221)
Net cash provided by investing activities	12,132	4,221
Cash Flows From Financing Activities:
Purchase of additional non-controlling interest	(43,507)
Proceeds from issuance of subsidiary equity	1,092
Proceeds from issuance of Non-Voting Common Stock	59,673	6,037
Repurchase of Voting Common Stock	(73)
Repurchase of Non-Voting Common Stock	(13,282)	(34,800)
Principal repayments on notes receivable from stock option exercises	931	460
Excess tax benefit of stock option exercises	8,253	225
Dividends paid	(166,979)	(21,967)
Net subscriptions received from (redemptions/distributions paid to) non-controlling interest holders	8,924	18,534
Consolidated CLO Entity Financing Activities:
Principal repayments of senior notes	(38,607)
Net cash used for financing activities	(183,575)	(31,511)
Effect of currency rate changes on cash and cash equivalents	(144)	(38)
Net decrease in cash and cash equivalents	(243,793)	(35,543)
Cash and cash equivalents, beginning of period	462,076	510,913
Cash and cash equivalents, end of period	218,283	475,370
Supplemental Cash Flow Information:
Cash paid for interest	113	36
Cash paid for interest by consolidated CLO entity	4,600	722
Cash paid for income taxes, net of refunds	3,812	9,683
Supplemental Disclosure of Non-Cash Information:
Increase in equipment and leasehold improvements due to non-cash additions	565	142
Exercise of stock options through issuance of notes receivable	4,464	137
Deconsolidations of Sponsored Investment Funds:
Decrease in investments	(10,533)	(16,470)
Decrease in non-controlling interests	$ (10,155)	$ (16,564)