v3.6.0.2

EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
EMPLOYEE BENEFIT PLANS |  |  |
Minimum age required to be eligible to participate in the 401(k) plan | 21 years |  |
Expenses accrued relating to employer matching contributions | $ 1,971 | $ 1,779 | $ 1,525

X
- Definition Represents the required minimum age of employees of the entity to be eligible to participate in the defined contribution 401(k) plan. + References No definition available. + Details
Name: | mc_DefinedContributionPlanMinimumAgeRequiredToBeEligibleToParticipateInPlan
Namespace Prefix: | mc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration