Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income	$ 46,439	$ 58,160
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in net income attributable to AB Unitholders	(52,638)	(65,698)
Cash distributions received from AB	67,485	88,671
Changes in assets and liabilities:
Increase in other assets	(821)	0
Decrease in other liabilities	(589)	(1,028)
Net cash provided by operating activities	59,876	80,105
Cash flows from investing activities:
Investments in AB with proceeds from exercise of compensatory options to buy AB Holding Units	(7,382)	(4,008)
Net cash used in investing activities	(7,382)	(4,008)
Cash flows from financing activities:
Cash distributions to Unitholders	(60,807)	(81,801)
Capital contributions from AB	931	1,696
Proceeds from exercise of compensatory options to buy AB Holding Units	7,382	4,008
Net cash used in financing activities	(52,494)	(76,097)
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