REGULATORY REQUIREMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Regulatory requirements
Minimum net capital requirement	$ 250
Moelis US
Regulatory requirements
Net capital	76,871	$ 41,373
Net capital in excess of required net capital	76,621	41,123
Moelis UK
Regulatory requirements
Net capital	8,827	17,586
Net capital in excess of required net capital	$ 8,774	$ 17,531