Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Cash Flows From Operating Activities:
Net income	$ 158,297	$ 190,327
Adjustments to reconcile net income to net cash (used for) provided by operating activities:
Depreciation and amortization	19,673	19,007
Unamortized gain on derivative instrument	2,015
Amortization of deferred sales commissions	14,575	15,973
Stock-based compensation	40,446	42,819
Deferred income taxes	(4,117)	(7,315)
Net gains on investments and derivatives	(399)	(7,786)
Equity in net income of affiliates, net of amortization	(10,834)	(2,642)
Dividends received from affiliates	13,218	11,117
Loss on extinguishment of debt	52,886
Consolidated CLO entity operating activities:
Net losses (gains) on bank loans, other investments and note obligations	4,197	(15,366)
Amortization of investments	(584)	(790)
Net decrease in other assets and liabilities, including cash	(23,119)	(19,655)
Changes in operating assets and liabilities:
Investment advisory fees and other receivables	(21,852)	3,469
Investments in trading securities	(194,121)	(72,400)
Deferred sales commissions	(14,098)	(8,462)
Other assets	28,424	(169)
Accrued compensation	(13,547)	(27,307)
Accounts payable and accrued expenses	(4,587)	6,027
Other liabilities	(46,702)	17,941
Net cash (used for) provided by operating activities	(229)	144,788
Cash Flows From Investing Activities:
Additions to equipment and leasehold improvements	(4,220)	(2,928)
Net cash paid in acquisition	(86,429)	(12,334)
Cash paid for intangible assets	(300)	(200)
Proceeds from sales of investments	71,414	72,597
Purchase of investments	(747)	(21,624)
Consolidated CLO entity investing activities:
Proceeds from sales and maturities of bank loans and other investments	192,036	182,784
Purchase of bank loans and other investments	(6,547)	(163,037)
Net cash provided by investing activities	165,207	55,258
Cash Flows From Financing Activities:
Purchase of additional non-controlling interest	(43,507)	(19,864)
Proceeds from issuance of subsidiary equity	1,092
Line of credit issuance costs		(1,192)
Long-term debt issuance costs	(3,012)
Proceeds from issuance of long-term debt	323,440
Repayment of long-term debt	(250,000)
Loss on extinguishment of debt	(52,886)
Proceeds from issuance of Voting Common Stock		56
Proceeds from issuance of Non-Voting Common Stock	99,853	22,848
Repurchase of Voting Common Stock	(73)
Repurchase of Non-Voting Common Stock	(48,162)	(76,586)
Principal repayments on notes receivable from stock option exercises	2,028	764
Excess tax benefit of stock option exercises	15,682	2,228
Dividends paid	(191,266)	(65,950)
Net subscriptions received from (redemptions/distributions paid to) non-controlling interest holders	59,874	27,138
Consolidated CLO entity financing activities:
Principal repayments of senior notes	(159,942)
Net cash used for financing activities	(246,879)	(110,558)
Effect of currency rate changes on cash and cash equivalents	(761)	(219)
Net (decrease) increase in cash and cash equivalents	(82,662)	89,269
Cash and cash equivalents, beginning of period	462,076	510,913
Cash and cash equivalents, end of period	379,414	600,182
Supplemental Cash Flow Information:
Cash paid for interest	20,473	24,524
Cash paid for interest by consolidated CLO entity	11,069	13,584
Cash paid for income taxes, net of refunds	115,502	117,829
Supplemental Disclosure of Non-Cash Information:
Increase in equipment and leasehold improvements due to non-cash additions	438	174
Exercise of stock options through issuance of notes receivable	4,734	211
Non-controlling interest call option recorded in other liabilities	3,096
Deconsolidations of Sponsored Investment Funds:
Decrease in investments	(59,889)	(23,639)
Decrease in non-controlling interests	$ (61,023)	$ (21,586)