Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash flows from operating activities:
Net income	$ 385,843	$ 279,380	$ 238,563
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in net income attributable to AB Unitholders	(416,326)	(308,404)	(266,292)
Cash distributions received from AB	385,236	298,919	249,463
Changes in assets and liabilities:
Decrease (increase) in other assets	92	(31)	(61)
Increase in other liabilities	264	150	1,082
Net cash provided by operating activities	355,109	270,014	222,755
Cash flows from investing activities:
Investments in AB with proceeds from exercises of compensatory options to buy AB Holding Units	(3,402)	(147)	(11,511)
Net cash used in investing activities	(3,402)	(147)	(11,511)
Cash flows from financing activities:
Cash distributions to Unitholders	(357,455)	(270,881)	(222,485)
Capital contributions from (to) AB	2,346	867
Capital contributions from (to) AB			(270)
Proceeds from exercise of compensatory options to buy AB Holding Units	3,402	147	11,511
Net cash used in financing activities	(351,707)	(269,867)	(211,244)
Change in cash and cash equivalents	0	0	0
Cash and cash equivalents as of beginning of the year	0	0	0
Cash and cash equivalents as of end of the year	0	0	0
Cash paid:
Income taxes	30,127	28,906	26,650
Non-cash investing activities:
Issuance of AB Holding Units to fund long-term incentive compensation plan awards	151,082	107,366	146,488
Retirement of AB Holding Units	$ (143,460)	$ (78,388)	$ (110,752)