Document and Entity Information	9 Months Ended
	Sep. 30, 2014	Oct. 27, 2014 Class A common stock	Oct. 27, 2014 Class B common stock
Entity Registrant Name	Moelis & Co
Entity Central Index Key	0001596967
Document Type	10-Q
Document Period End Date	Sep. 30, 2014
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		15,159,781	36,149,180
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q3