Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (9,044)	$ 37,667	$ 21,082	$ 53,844
Foreign currency translation adjustment, net of tax	(95)	(57)	(1,725)	483
Other comprehensive income (loss)	(95)	(57)	(1,725)	483
Comprehensive income (loss)	(9,139)	37,610	19,357	54,327
Less: Comprehensive income (loss) attributable to noncontrolling interests	(3,329)	8,196	1,341	10,922
Comprehensive income (loss) attributable to Moelis & Company	$ (5,810)	$ 29,414	$ 18,016	$ 43,405