Earnings per Share - Diluted Net Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Diluted Net Income [Abstract]
Less: Net Income Attributable to Non-Controlling Interests	$ 13,091	$ 23,635	$ 40,674	$ 66,951
Net Income of Pzena Investment Management, Inc.	2,697	5,068	8,035	13,858
Diluted Net Income	12,782	22,663	39,026	63,571
Pzena Investment Management, LLC
Diluted Net Income [Abstract]
Net Income Attributable to Non-Controlling Interests	13,887	23,385	42,800	66,258
Less: Assumed Corporate Income Taxes	3,802	5,790	11,809	16,545
Less: Net Income Attributable to Non-Controlling Interests	10,085	17,595	30,991	49,713
Net Income of Pzena Investment Management, Inc.	2,697	5,068	8,035	13,858
Diluted Net Income	$ 12,782	$ 22,663	$ 39,026	$ 63,571