Shareholders' Equity - Incremental Assets and Liabilities Assumed in Exchanges (Details) - USD ($) $ in Thousands				12 Months Ended
	Dec. 22, 2021	Jun. 10, 2021	Dec. 22, 2020	Dec. 31, 2021	Dec. 31, 2020
Incremental assets and liabilities assumed [Abstract]
Pzena Investment Management, LLC Members' Capital	$ 372	$ 9,279	$ 6,694
Pzena Investment Management, LLC Accumulated Deficit	(324)	(8,210)	(6,072)
Realizable Deferred Tax Asset		2,493	506
Net Tax Receivable Liability to Converting Unitholders		(2,119)	(430)
Total	48	1,443	698
Unit Conversion				$ 321	$ 390	[1]
Total	48	1,443	698
Additional Paid-In Capital
Incremental assets and liabilities assumed [Abstract]
Unit Conversion	$ 48	1,435	693	1,430	1,007
Common Class A | Common Stock
Incremental assets and liabilities assumed [Abstract]
Unit Conversion		$ 8	$ 5	$ 8	$ 5

[1] Net consolidation (Deconsolidation) of Sponsored Investment Funds have been reclassified to conform to the current year presentation.