Condensed Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 52,274	$ 58,457	$ 98,713	$ 116,617
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in net income attributable to AB Unitholders	(59,023)	(65,388)	(111,661)	(131,086)
Cash distributions received from AB			121,617	167,861
Changes in assets and liabilities:
Decrease in other liabilities			(7)	(525)
Net cash provided by operating activities			108,662	152,867
Cash flows from investing activities:
Investments in AB with proceeds from exercise of compensatory options to buy AB Holding Units			(8,951)	(8,314)
Net cash used in investing activities			(8,951)	(8,314)
Cash flows from financing activities:
Cash distributions to Unitholders			(108,168)	(154,064)
Capital contributions (to) from AB			(494)	1,197
Proceeds from exercise of compensatory options to buy AB Holding Units			8,951	8,314
Net cash used in financing activities			(99,711)	(144,553)
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