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Fair Value Measurements - Textual (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Fair Value Disclosures [Abstract] |  |
Deferred acquisition consideration, fixed payments | $ 33,141 mdca_DeferredAcquisitionConsiderationFixedPayments | $ 2,065 mdca_DeferredAcquisitionConsiderationFixedPayments
Business acquisition, contingent consideration potential cash payment, total | $ 205,368 mdca_BusinessAcquisitionContingentConsiderationPotentialCashPaymentTotal | $ 153,913 mdca_BusinessAcquisitionContingentConsiderationPotentialCashPaymentTotal

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