Condensed Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
ASSETS
Cash and cash equivalents	$ 639,834	$ 671,930
Cash and securities segregated, at fair value (cost: $1,024,491 and $816,350)	1,024,529	816,350
Receivables, net:
Brokers and dealers	281,324	199,690
Brokerage clients	1,733,709	1,647,059
AB funds fees	191,510	212,115
Other fees	123,712	124,164
Investments:
Long-term incentive compensation-related	56,400	66,034
Other	348,981	377,555
Cash and cash equivalents	1,220,555	998,448
Other assets	236,727	211,893
Furniture, equipment and leasehold improvements, net	154,493	157,569
Goodwill	3,066,700	3,066,700
Intangible assets, net	98,748	105,784
Deferred sales commissions, net	23,180	30,126
Total assets	10,561,530	9,295,167
Payables:
Brokers and dealers	350,434	237,861
Securities sold not yet purchased	27,533	29,961
Brokerage clients	2,549,567	2,229,371
AB mutual funds	77,962	82,967
Accounts payable and accrued expenses	451,761	515,660
Accrued compensation and benefits	337,128	270,610
Debt	489,830	565,745
Liabilities	5,507,089	4,630,276
Commitments and contingencies (See Note 13)
Redeemable non-controlling interest	996,966	601,587
Capital:
General Partner	41,218	41,221
Limited partners: 269,839,937 and 268,659,333 units issued and outstanding	4,168,548	4,168,841
Receivables from affiliates	(12,489)	(11,494)
AB Holding Units held for long-term incentive compensation plans	(57,366)	(42,688)
Accumulated other comprehensive loss	(84,066)	(94,140)
Partners’ capital attributable to AB Unitholders	4,055,845	4,061,740
Non-redeemable non-controlling interests in consolidated entities	1,630	1,564
Total capital	4,057,475	4,063,304
Total liabilities, redeemable non-controlling interest and capital	10,561,530	9,295,167
Company-sponsored investment funds
Investments:
Cash and cash equivalents	580,721	326,518
Investments	1,956,470	1,246,283
Other assets	44,492	35,397
Payables:
Liabilities	1,222,874	698,101
Redeemable non-controlling interest	991,602	596,223
Capital:
Non-redeemable non-controlling interests in consolidated entities	$ 710	$ 757