UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
NET INCOME	$ 19,447	$ 17,217	$ 54,470	$ 45,064
OTHER COMPREHENSIVE (LOSS)/ GAIN
Foreign Currency Translation Adjustment	(27)	48	(90)	104
Total Other Comprehensive (Loss)/ Gain	(27)	48	(90)	104
Comprehensive Income	19,420	17,265	54,380	45,168
Less: Comprehensive Income Attributable to Non-Controlling Interests	15,151	14,264	43,100	37,188
Total Comprehensive Income Attributable to Pzena Investment Management, Inc.	$ 4,269	$ 3,001	$ 11,280	$ 7,980