Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net income	$ 582,746	$ 778,603
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of deferred sales commissions	26,678	24,866
Non-cash long-term incentive compensation expense	36,426	34,725
Depreciation and other amortization	44,702	33,603
Unrealized losses (gains) on investments	47,765	5,203
Non-cash lease expense	76,050	74,733
Other, net	20,158	13,799
Changes in assets and liabilities:
Decrease in securities, segregated	168,835	844,939
(Increase) in receivables	(224,089)	(423,059)
Decrease (increase) in investments	12,253	24,052
(Increase) in deferred sales commissions	(6,214)	(36,805)
(Increase) in other assets	(76,810)	(182,775)
(Decrease) in payables	(75,629)	(226,164)
Increase in accounts payable and accrued expenses	1,571	35,107
Increase in accrued compensation and benefits	360,817	462,274
Cash payments to relieve operating lease liabilities	(82,223)	(87,662)
Net cash provided by operating activities	1,013,147	1,403,243
Cash flows from investing activities:
Purchases of furniture, equipment and leasehold improvements	(36,088)	(52,074)
Acquisition of business, net cash acquired	40,282	(3,793)
Net cash provided by (used in) investing activities	4,194	(55,867)
Cash flows from financing activities:
(Repayments) of debt, net	(65,000)	(285,000)
(Decrease) increase in overdrafts payable	(19,746)	24,923
Distributions to General Partner and Unitholders	(862,858)	(797,811)
Capital contributions (to) affiliates	(312)	(1,914)
Additional investments by AB Holding with proceeds from exercise of compensatory options to buy AB Holding Units	178	3,402
Purchases of AB Holding Units to fund long-term incentive compensation plan awards, net	(107,295)	(121,461)
Repayment of acquisition-related debt obligation	(42,661)	0
Other	(1,268)	1,148
Net cash used in financing activities	(1,146,307)	(1,163,474)
Effect of exchange rate changes on cash and cash equivalents	(89,665)	(15,038)
Net (decrease) increase in cash and cash equivalents	(218,631)	168,864
Cash and cash equivalents as of beginning of the period	1,376,026	1,073,906
Cash and cash equivalents as of end of the period	1,157,395	1,242,770
Non-cash investing activities:
Fair value of assets acquired (less cash acquired of $40.8 million and $2.8 million, respectively)	1,050,234	13,235
Fair value of deferred tax asset recorded	4,823	0
Fair value of liabilities assumed	300,381	1,642
Fair value of redeemable non-controlling interest assumed	13,191	0
Non-cash financing activities:
Contingent consideration liability	229,571	7,800
Equity consideration issued/to be issued in connection with acquisition	552,196	0
Company-sponsored investment funds
Adjustments to reconcile net income to net cash provided by operating activities:
Unrealized losses (gains) on investments	90,297	3,878
Changes in assets and liabilities:
Decrease (increase) in investments	51,108	22,505
(Decrease) increase in other assets and liabilities of consolidated company-sponsored investment funds, net	(41,294)	1,421
Cash flows from financing activities:
(Redemptions) subscriptions of non-controlling interest in consolidated company-sponsored investment funds, net	$ (47,345)	$ 13,239