Condensed Consolidated Statements of Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Investment advisory and services fees	$ 459,065	$ 423,863	$ 902,902	$ 849,423
Bernstein research services	114,771	103,008	224,456	209,351
Distribution revenues	120,775	97,137	239,520	188,097
Dividend and interest income	4,534	4,981	8,980	9,387
Investment gains (losses)	8,350	(10,852)	15,301	20,106
Other revenues	27,455	24,844	53,755	49,129
Total revenues	734,950	642,981	1,444,914	1,325,493
Less: Interest expense	675	818	1,517	1,521
Net revenues	734,275	642,163	1,443,397	1,323,972
Expenses:
Employee compensation and benefits	306,487	272,821	607,722	575,364
Promotion and servicing:
Distribution-related payments	111,386	86,120	220,666	165,989
Amortization of deferred sales commissions	10,325	10,171	21,399	18,438
Other	56,332	51,775	107,324	101,509
General and administrative:
General and administrative	104,461	129,310	209,750	254,220
Real estate charges	1,935	6,787	2,573	16,056
Interest on borrowings	793	892	1,776	1,725
Amortization of intangible assets	5,902	5,540	11,335	10,679
Total expenses	597,621	563,416	1,182,545	1,143,980
Operating income	136,654	78,747	260,852	179,992
Income taxes	9,564	5,838	20,731	12,541
Net income	127,090	72,909	240,121	167,451
Net (loss) income of consolidated entities attributable to non-controlling interests	6,376	(1,276)	4,891	5,988
Net income attributable to AllianceBernstein Unitholders	$ 120,714	$ 74,185	$ 235,230	$ 161,463
Net income per AllianceBernstein Unit:
Basic (in dollars per share)	$ 0.43	$ 0.26	$ 0.84	$ 0.58
Diluted (in dollars per share)	$ 0.43	$ 0.26	$ 0.83	$ 0.58