Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 37,667	$ 53,130	$ 53,844	$ 107,111
Foreign currency translation adjustment, net of tax	(57)	(1,843)	483	(164)
Other comprehensive income (loss)	(57)	(1,843)	483	(164)
Comprehensive income (loss)	37,610	51,287	54,327	106,947
Less: Comprehensive income attributable to noncontrolling interests	8,196	16,878	10,922	38,144
Comprehensive income (loss) attributable to Moelis & Company	$ 29,414	$ 34,409	$ 43,405	$ 68,803