v2.4.1.9
BUSINESS CHANGES AND DEVELOPMENTS (Details 2) (Class A common stock, Secondary Offering)
 1 Months Ended
Nov. 30, 2014
Class A common stock | Secondary Offering
  
Secondary Offering  
Issuance of common stock (in shares) 6,325,000us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ us-gaap_SubsidiarySaleOfStockAxis
= mc_SecondaryOfferingMember
Issuance of Class A common stock and acquisition of Class A partnership units in connection with secondary offering (in shares) 4,511,058mc_ExchangeOfPartnershipUnitsToCommonStockInConnectionWithSecondaryOfferingShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ us-gaap_SubsidiarySaleOfStockAxis
= mc_SecondaryOfferingMember