UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
REVENUE		$ 39,580	$ 36,229	$ 117,180	$ 102,386
EXPENSES
Compensation and Benefits Expense		16,122	14,763	47,520	44,681
General and Administrative Expense		3,322	3,062	9,856	9,585
Total Operating Expenses		19,444	17,825	57,376	54,266
Operating Income		20,136	18,404	59,804	48,120
OTHER INCOME
Interest Income		234	76	382	106
Dividend Income		52	117	127	318
Net Realized and Unrealized Gains/ (Losses) from Investments		142	626	(71)	1,719
Equity in Earnings/ (Losses) of Affiliates		204	428	(73)	1,083
Other (Expense)/ Income		(27)	59	(22)	178
Total Other Income		605	1,306	343	3,404
Income Before Income Taxes		20,741	19,710	60,147	51,524
Income Tax Expense		1,294	2,493	5,677	6,460
Net Income		19,447	17,217	54,470	45,064
Less: Net Income Attributable to Non-Controlling Interests		15,185	14,228	43,213	37,110
Net Income Attributable to Pzena Investment Management, Inc.		4,262	2,989	11,257	7,954
Net Income for Basic Earnings per Share		$ 4,262	$ 2,989	$ 11,257	$ 7,954
Basic Earnings per Share		$ 0.24	$ 0.17	$ 0.63	$ 0.46
Basic Weighted Average Shares Outstanding	[1]	17,489,380	17,285,307	17,752,788	17,319,948
Net Income for Diluted Earnings per Share		$ 15,786	$ 11,862	$ 44,033	$ 31,077
Diluted Earnings per Share		$ 0.22	$ 0.17	$ 0.61	$ 0.44
Diluted Weighted Average Shares Outstanding	[1]	71,677,806	70,763,213	71,934,411	70,845,892
Cash Dividends per Share of Class A Common Stock		$ 0.03	$ 0.03	$ 0.48	$ 0.34

[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.