Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 62,259	$ 46,439
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in net income attributable to AB Unitholders	(69,914)	(52,638)
Cash distributions received from AB	91,562	67,485
Changes in assets and liabilities:
(Increase) in other assets	0	(821)
(Decrease) in other liabilities	(901)	(589)
Net cash provided by operating activities	83,006	59,876
Cash flows from investing activities:
Investments in AB with proceeds from exercise of compensatory options to buy AB Holding Units	(147)	(7,382)
Net cash used in investing activities	(147)	(7,382)
Cash flows from financing activities:
Cash distributions to Unitholders	(83,705)	(60,807)
Capital contributions from (to) AB	699	931
Proceeds from exercise of compensatory options to buy AB Holding Units	147	7,382
Net cash used in financing activities	(82,859)	(52,494)
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