Long-term Incentive Compensation Plans (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Additional investments by AB Holding with proceeds from exercise of compensatory options to buy AB Holding Units	$ 0	$ 178
AB Holding Units
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Units granted to employees and eligible directors (in shares)	400,000	800,000
Units issued upon exercise of options (in shares)	0	5,774
Additional investments by AB Holding with proceeds from exercise of compensatory options to buy AB Holding Units	$ 0	$ 100