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Accrued and Other Liabilities - Textual (Details) (USD $) | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
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Accrued Liabilities and Other Liabilities [Abstract] |  |  |  |
Accrued media cost, current | $ 168,508,000 mdca_AccruedMediaCostCurrent | $ 144,161,000 mdca_AccruedMediaCostCurrent |  |
Trust liabilities | 6,419,000 us-gaap_OtherLiabilities | 0 us-gaap_OtherLiabilities |  |
Accrued and Other Liabilities Attributable To Noncontrolling Interest | $ 6,014,000 mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest | $ 5,210,000 mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest | $ 3,624,000 mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest | $ 4,049,000 mdca_AccruedAndOtherLiabilitiesAttributableToNoncontrollingInterest

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

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- Definition The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_OtherLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant