Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2018	Jan. 31, 2017
Cash Flows From Operating Activities:
Net income	$ 88,511	$ 64,341
Adjustments to reconcile net income to net cash used for operating activities:
Depreciation and amortization	5,272	4,494
Amortization of deferred sales commissions	4,277	3,855
Stock-based compensation	23,730	20,178
Deferred income taxes	30,820	11,101
Net (gains) losses on investments and derivatives	(977)	3,935
Loss on write-off of Hexavest option	6,523	0
Equity in net income of affiliates, net of amortization	(3,014)	(2,506)
Dividends received from affiliates	2,875	2,905
Consolidated CLO entity's operating activities:
Net gains on bank loan investments	(894)	0
Net decrease in other assets and liabilities, including cash	(613)	0
Changes in operating assets and liabilities:
Management fees and other receivables	(12,915)	(124)
Investments in trading securities	(93,285)	(113,213)
Deferred sales commissions	(7,764)	(8,174)
Other assets	15,837	11,356
Accrued compensation	(128,582)	(108,269)
Accounts payable and accrued expenses	4,742	7,515
Other liabilities	5,460	69,256
Net cash used for operating activities	(59,997)	(33,350)
Cash Flows From Investing Activities:
Additions to equipment and leasehold improvements	(2,594)	(2,435)
Net cash paid in acquisition	0	(52,016)
Proceeds from sale of investments	0	4,102
Purchase of investments	(20,326)	(32)
Consolidated CLO entity's investing activities:
Proceeds from sales of bank loan investments	13,921	0
Purchase of bank loan investments	(37,973)	0
Net cash used for investing activities	(46,972)	(50,381)
Cash Flows From Financing Activities:
Purchase of additional non-controlling interest	(20,818)	(9,451)
Proceeds from issuance of Non-Voting Common Stock	44,284	27,734
Repurchase of Non-Voting Common Stock	(36,343)	(53,601)
Principal repayments on notes receivable from stock option exercises	987	2,263
Dividends paid	(37,499)	(31,749)
Net subscriptions received from (redemptions/distributions paid to) non-controlling interest holders	51,461	43,424
Consolidated CLO entity's financing activities:
Proceeds from line of credit	23,936	0
Net cash provided by (used for) financing activities	26,008	(21,380)
Effect of currency rate changes on cash and cash equivalents	3,722	1,050
Net decrease in cash and cash equivalents	(77,239)	(104,061)
Cash and cash equivalents, beginning of period	610,555	424,174
Cash and cash equivalents, end of period	533,316	320,113
Supplemental Cash Flow Information:
Cash paid for interest	5,985	5,988
Cash paid for interest by consolidated CLO entity	77	0
Cash paid for income taxes, net of refunds	13,841	4,321
Supplemental Disclosure of Non-Cash Information:
Increase in equipment and leasehold improvements due to non-cash additions	746	275
Exercise of stock options through issuance of notes receivable	393	331
Increase in non-controlling interest due to net consolidation (deconsolidation) of sponsored investment funds	61,441	29,969
Decrease in bank loan investments of consolidated CLO entity due to unsettled sales	(5,023)	0
Increase in bank loan investments of consolidated CLO entity due to unsettled purchases	$ 25,284	$ 0