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Accrued and Other Liabilities - Textual (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
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Accrued Liabilities and Other Liabilities [Abstract] |  |  |  |
Accrued media cost, current | $ 201,872 | $ 187,540 |  |
Trust Liability, Current | 5,341 | 5,122 |  |
Accrued and Other Liabilities Attributable To Noncontrolling Interest | $ 4,154 | $ 5,473 | $ 6,014 | $ 5,210

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- Definition Carrying value as of the balance sheet date of accrued and other liabilities attributable to noncontrolling interest during the reporting period. + References No definition available. + Details
Name: | mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Accrued Media Cost, Current + References No definition available. + Details
Name: | mdca_AccruedMediaCostCurrent
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Trust Liability, Current + References No definition available. + Details
Name: | mdca_TrustLiabilityCurrent
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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