Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Revenues	$ 207,723	$ 170,041	$ 647,546	$ 515,448
Expenses
Compensation and benefits	120,701	99,694	375,987	302,228
Occupancy	4,976	4,393	14,109	12,670
Professional fees	5,871	4,494	18,129	13,674
Communication, technology and information services	7,414	6,427	21,864	18,636
Travel and related expenses	9,385	7,294	31,796	21,990
Depreciation and amortization	1,135	891	3,290	2,570
Other expenses	5,329	6,969	18,745	18,059
Total expenses	154,811	130,162	483,920	389,827
Operating income (loss)	52,912	39,879	163,626	125,621
Other income and (expenses)	1,090	14,955	2,963	32,888
Income (loss) from equity method investments	527	2,791	3,641	4,565
Income (loss) before income taxes	54,529	57,625	170,230	163,074
Provision for income taxes	9,641	14,354	18,231	30,900
Net income (loss)	44,888	43,271	151,999	132,174
Net income (loss) attributable to noncontrolling interests	12,439	24,066	50,535	77,961
Net income (loss) attributable to Moelis & Company	32,449	19,205	101,464	54,213
Class A Common Stock
Expenses
Net income (loss) attributable to Moelis & Company	$ 32,449	$ 19,205	$ 101,464	$ 54,213
Weighted-average shares of Class A common stock outstanding
Basic (in shares)	45,203,781	32,505,940	41,211,843	29,094,514
Diluted (in shares)	53,141,198	39,784,633	49,173,904	35,872,847
Net income (loss) per share attributable to holders of shares of Class A common stock
Basic (in dollars per share)	$ 0.72	$ 0.59	$ 2.46	$ 1.86
Diluted (in dollars per share)	0.61	0.48	2.06	1.51
Dividends declared per share of Class A common stock	$ 1.97	$ 0.37	$ 4.41	$ 2.11