Long-term Incentive Compensation Plans (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Proceeds from stock options exercised	$ 178	$ 3,402
AB Holding Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units issued upon options exercised (in shares)	5,774	100,000
Proceeds from stock options exercised	$ 100	$ 3,400
Employees and Eligible Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted AB Holding Unit awards granted to employees and Eligible Directors (in shares)	800,000	3,500,000

Amount of cash inflow from exercise of option under share-based payment arrangement.

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