Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 43,178	$ 50,258	$ 128,829	$ 143,922
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in net income attributable to AB Unitholders	(49,055)	(55,925)	(146,668)	(160,759)
Cash distributions received from AB			173,025	143,982
Changes in assets and liabilities:
(Increase) in other assets			0	(223)
(Decrease) increase in other liabilities			(395)	81
Net cash provided by operating activities			154,791	127,003
Cash flows from investing activities:
Investments in AB with proceeds from exercise of compensatory options to buy AB Holding Units			(17,672)	(2,371)
Net cash used in investing activities			(17,672)	(2,371)
Cash flows from financing activities:
Cash distributions to Unitholders			(155,056)	(127,348)
Capital contributions from AB			265	345
Proceeds from exercise of compensatory options to buy AB Holding Units			17,672	2,371
Net cash used in financing activities			(137,119)	(124,632)
Change in cash and cash equivalents			0	0
Cash and cash equivalents as of beginning of period			0	0
Cash and cash equivalents as of end of period	$ 0	$ 0	$ 0	$ 0