UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
REVENUE		$ 50,877	$ 30,131	$ 96,748	$ 64,810
EXPENSES
Compensation and Benefits Expense		19,035	15,578	38,170	34,718
General and Administrative Expense		3,920	3,575	7,616	7,997
Total Operating Expenses		22,955	19,153	45,786	42,715
Operating Income		27,922	10,978	50,962	22,095
OTHER INCOME/ (EXPENSE)
Interest Income		45	87	100	246
Interest Expense			(12)		(12)
Dividend Income		216	70	358	151
Net Realized and Unrealized Gains/ (Losses) from Investments		899	1,906	3,462	(3,341)
Equity in Earnings/ (Losses) of Affiliates		470	1,144	2,007	(3,118)
Other Income/ (Expense)		100	47	158	(40)
Total Other Income/ (Expense)		1,730	3,242	6,085	(6,114)
Income Before Income Taxes		29,652	14,220	57,047	15,981
Income Tax Expense		2,575	1,371	4,941	2,363
Net Income		27,077	12,849	52,106	13,618
Less: Net Income Attributable to Non-Controlling Interests		22,474	10,651	43,316	11,420
Net Income Attributable to Pzena Investment Management, Inc.		4,603	2,198	8,790	2,198
Supplemental Income Statement Elements [Abstract]
Net Income for Basic Earnings per Share		$ 4,603	$ 2,198	$ 8,790	$ 2,198
Basic Earnings per Share		$ 0.27	$ 0.13	$ 0.51	$ 0.13
Basic Weighted Average Shares Outstanding	[1]	17,255,593	17,215,163	17,248,045	17,502,674
Net Income for Diluted Earnings per Share		$ 21,176	$ 9,997	$ 40,906	$ 10,749
Diluted Earnings per Share	[2]	$ 0.25	$ 0.13	$ 0.49	$ 0.13
Diluted Weighted Average Shares Outstanding	[1]	84,336,569	78,608,197	83,932,385	79,261,048
Cash Dividends per Share of Class A Common Stock		$ 0.03	$ 0.03	$ 0.28	$ 0.49

[1] ^{The Company issues restricted shares of Class A common stock and restricted Class B units that have non-forfeitable dividend rights.  Under the "two-class method," these shares and units are considered participating securities and are required to be included in the computation of basic and diluted earnings per share.}

[2] ^{During the six months ended June 30, 2020, the calculation of diluted earnings per share resulted in an increase in earnings per share. Therefore, diluted earnings per share is assumed to be equal to basic earnings per share. Please refer to Note 5, “Earnings per Share,” for further details.}