UNAUDITED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
REVENUE		$ 39,252	$ 32,044
EXPENSES
Compensation and Benefits Expense		16,174	15,622
General and Administrative Expense		3,155	3,325
Total Operating Expenses		19,329	18,947
Operating Income		19,923	13,097
OTHER (EXPENSE)/ INCOME
Interest Income		62	16
Dividend Income		36	92
Net Realized and Unrealized (Losses)/ Gains from Investments		(34)	796
Equity in (Losses)/ Earnings of Affiliates		(129)	435
Other Income		15	16
Total Other (Expense)/ Income		(50)	1,355
Income Before Income Taxes		19,873	14,452
Income Tax Expense		2,207	1,726
Net Income		17,666	12,726
Less: Net Income Attributable to Non-Controlling Interests		14,143	10,390
Net Income Attributable to Pzena Investment Management, Inc.		3,523	2,336
Net Income for Basic Earnings per Share		$ 3,523	$ 2,336
Basic Earnings per Share (in dollars per share)		$ 0.20	$ 0.13
Basic Weighted Average Shares Outstanding (in shares)	[1]	18,015,368	17,361,153
Net Income for Diluted Earnings per Share		$ 14,226	$ 8,704
Diluted Earnings per Share (in dollars per share)		$ 0.20	$ 0.12
Diluted Weighted Average Shares Outstanding (in shares)	[1]	72,285,962	70,894,698
Cash Dividends per Share of Class A Common Stock (in dollars per share)		$ 0.42	$ 0.28

[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.