Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2017	Jan. 31, 2016
Cash Flows From Operating Activities:
Net income	$ 64,341	$ 63,232
Adjustments to reconcile net income to net cash (used for) provided by operating activities:
Depreciation and amortization	4,494	5,414
Amortization of deferred sales commissions	3,855	4,044
Stock-based compensation	20,178	18,234
Deferred income taxes	11,101	6,666
Net losses (gains) on investments and derivatives	3,935	(585)
Equity in net income of affiliates, net of amortization	(2,506)	(2,519)
Dividends received from affiliates	2,905	2,931
Consolidated CLO entity's operating activities:
Net losses on bank loans, other investments and note obligations	0	464
Amortization	0	15
Net increase in other assets and liabilities, including cash and cash equivalents	0	81,271
Changes in operating assets and liabilities:
Management fees and other receivables	(124)	15,060
Investments in trading securities	(113,213)	(24,094)
Deferred sales commissions	(8,174)	(4,958)
Other assets	11,356	22,679
Accrued compensation	(108,269)	(118,954)
Accounts payable and accrued expenses	7,515	2,433
Other liabilities	63,534	15,895
Net cash (used for) provided by operating activities	(39,072)	87,228
Cash Flows From Investing Activities:
Additions to equipment and leasehold improvements	(2,435)	(2,947)
Issuance of loan to affiliate	0	(5,000)
Net cash paid in acquisition	(52,016)	0
Proceeds from sale of investments	4,102	8,416
Purchase of investments	(32)	(33)
Consolidated CLO entity's investing activities:
Proceeds from sales and maturities of bank loans and other investments	0	16,872
Purchase of bank loans and other investments	0	(99,785)
Net cash used for investing activities	(50,381)	(82,477)
Cash Flows From Financing Activities:
Purchase of additional non-controlling interest	(9,451)	(15,580)
Proceeds from issuance of Voting Common Stock	0	232
Proceeds from issuance of Non-Voting Common Stock	27,734	7,007
Repurchase of Voting Common Stock	0	(77)
Repurchase of Non-Voting Common Stock	(53,601)	(73,341)
Principal repayments on notes receivable from stock option exercises	2,263	972
Excess tax benefit of stock option exercises	5,722	2,261
Dividends paid	(31,749)	(30,437)
Net subscriptions received from (redemptions/distributions paid to) non-controlling interest holders	43,424	(373)
Consolidated CLO entities' financing activities:
Net cash used for financing activities	(15,658)	(109,336)
Effect of currency rate changes on cash and cash equivalents	1,050	(2,840)
Net decrease in cash and cash equivalents	(104,061)	(107,425)
Cash and cash equivalents, beginning of period	424,174	465,558
Cash and cash equivalents, end of period	320,113	358,133
Supplemental Cash Flow Information:
Cash paid for interest	5,988	5,986
Cash paid for income taxes, net of refunds	4,321	5,272
Supplemental Disclosure of Non-Cash Information:
Increase in equipment and leasehold improvements due to non-cash additions	275	608
Exercise of stock options through issuance of notes receivable	331	531
Net Consolidations of Sponsored Investment Funds:
Increase in investments	91,135	0
Increase in other liabilities, net of other assets	51,177	0
Increase in non-controlling interests	$ 29,969	$ 0