Divestitures And Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Jul. 01, 2022	Dec. 31, 2023	Dec. 31, 2022
Purchase price allocation:
Goodwill		$ 3,598,591	$ 3,598,591
CarVal
Business Acquisition [Line Items]
Fair value of AB Holding units issued	$ 589,169
Fair value of contingent consideration	228,885
Total purchase consideration	818,054
Purchase price allocation:
Cash and cash equivalents	40,777
Receivables, net	82,523
Investments - other	947
Furniture, equipment, and leasehold improvements, net	2,464
Right-of-use assets	16,482
Other assets	10,600
Deferred tax asset	5,073
Intangible assets	303,000
Goodwill	666,130	$ 666,100
Total assets acquired	1,127,996
Liabilities assumed:
Accounts payable and accrued expenses	(17,793)
Accrued compensation and benefits	(219,726)
Debt	(42,661)
Lease liabilities	(16,571)
Non-redeemable non-controlling interests in consolidated entities	(13,191)
Total liabilities assumed	(309,942)
Net assets acquired	$ 818,054