Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 56,926	$ 52,274	$ 119,185	$ 98,713
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in net income attributable to AB Unitholders	(63,201)	(59,023)	(133,115)	(111,661)
Cash distributions received from AB			160,259	121,617
Changes in assets and liabilities:
(Increase) in other assets			(310)	0
(Decrease) in other liabilities			(1,460)	(7)
Net cash provided by operating activities			144,559	108,662
Cash flows from investing activities:
Investments in AB with proceeds from exercise of compensatory options to buy AB Holding Units			(147)	(8,951)
Net cash used in investing activities			(147)	(8,951)
Cash flows from financing activities:
Cash distributions to Unitholders			(145,530)	(108,168)
Capital contributions from (to) AB			971
Capital contributions from (to) AB				(494)
Proceeds from exercise of compensatory options to buy AB Holding Units			147	8,951
Net cash used in financing activities			(144,412)	(99,711)
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