Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 54,698	$ 44,888	$ 108,542	$ 151,999
Foreign currency translation adjustment, net of tax	(322)	(707)	161	(871)
Other comprehensive income (loss)	(322)	(707)	161	(871)
Comprehensive income (loss)	54,376	44,181	108,703	151,128
Less: Comprehensive income attributable to noncontrolling interests	14,016	12,223	24,938	50,367
Comprehensive income (loss) attributable to Moelis & Company	$ 40,360	$ 31,958	$ 83,765	$ 100,761