Consolidated Statements of Financial Condition - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 671,930	$ 656,985
Cash and securities segregated, at fair value (cost $816,350 and $946,093)	816,350	946,097
Receivables, net:
Brokers and dealers	199,690	263,621
Brokerage clients	1,647,059	1,513,656
Due from Related Parties	212,115	238,062
Other fees	124,164	104,376
Investments:
Long-term incentive compensation-related	66,034	67,761
Other	377,555	373,344
Cash and cash equivalents	998,448	994,510
Other assets	211,893	195,615
Furniture, equipment and leasehold improvements, net	157,569	159,564
Goodwill	3,066,700	3,066,700
Intangible assets, net	105,784	134,606
Deferred sales commissions, net	30,126	63,890
Total assets	9,295,167	8,741,158
Payables:
Brokers and dealers	237,861	239,578
Securities sold not yet purchased	29,961	40,944
Brokerage clients	2,229,371	2,360,481
AB mutual funds	82,967	150,939
Accounts payable and accrued expenses	515,660	430,569
Accrued compensation and benefits	270,610	251,019
Debt	565,745	512,970
Total liabilities	4,630,276	4,280,010
Commitments and contingencies (See Note 13)
Redeemable non-controlling interest	601,587	392,959
Capital:
General Partner	41,221	41,100
Limited partners: 268,659,333 and 268,893,534 units issued and outstanding	4,168,841	4,154,810
Receivables from affiliates	(11,494)	(12,830)
AB Holding Units held for long-term incentive compensation plans	(42,688)	(32,967)
Accumulated other comprehensive loss	(94,140)	(118,096)
Partners’ capital attributable to AB Unitholders	4,061,740	4,032,017
Non-redeemable non-controlling interests in consolidated entities	1,564	36,172
Total capital	4,063,304	4,068,189
Total liabilities and capital	9,295,167	8,741,158
VIEs Consolidated [Member]
Investments:
Cash and cash equivalents	326,518	337,525
Investments	1,246,283	570,876
Other assets	35,397	48,480
Payables:
Liabilities of consolidated company-sponsored investment funds	$ 698,101	$ 293,510