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Fair Value Measurements (Details Textual) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Fair Value Disclosures [Abstract] |  |
Deferred Acquisition Consideration, Fixed Payments | $ 35,898 | $ 2,065
Business Acquisition, Contingent Consideration Potential Cash Payment, Total | $ 209,916 | $ 153,913

X
- Definition The aggregate amount of deferred acquisition consideration as of the reporting date. + References No definition available. + Details
Name: | mdca_BusinessAcquisitionContingentConsiderationPotentialCashPaymentTotal
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The additional amount paid towards Deferred acquisition consideration. + References No definition available. + Details
Name: | mdca_DeferredAcquisitionConsiderationFixedPayments
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FairValueDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration