FAIR VALUE MEASUREMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013
Changes to the Company's investment classified as Level 3
Transfers between Level 1, Level 2 or Level 3	$ 0	$ 0
Common Stock
Changes to the Company's investment classified as Level 3
Balance at beginning of the period	1,904
Non-cash settlement of customer receivable	1,000
Distribution to Parent	$ (2,904)

Represents the transfer between the levels of fair value hierarchy that have taken place during the period.

No definition available.

Name:	mc_FairValueMeasurementTransfersBetweenLevels
Namespace Prefix:	mc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount distributed to parent in non-cash investing activities.

+ References

No definition available.

+ Details

Name:	mc_NoncashDistributionToParent
Namespace Prefix:	mc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of accounts receivable settled in noncash investing activities.

+ References

No definition available.

+ Details

Name:	mc_NoncashSettlementOfAccountsReceivable
Namespace Prefix:	mc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

+ Details

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant