Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 422,978	$ 218,438	$ 135,692
Foreign currency translation adjustment, net of tax	(431)	(2,040)	1,452
Other comprehensive income (loss)	(431)	(2,040)	1,452
Comprehensive income (loss)	422,547	216,398	137,144
Less: Comprehensive income (loss) attributable to noncontrolling interests	57,693	39,200	30,908
Comprehensive income (loss) attributable to Moelis & Company	$ 364,854	$ 177,198	$ 106,236