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Fair Value Measurements (Details Textual) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2012 | Sep. 30, 2011
--- | --- | ---
Deferred Acquisition Consideration, Fixed Payments | $ 3,153 | $ 6,704
Business Acquisition, Contingent Consideration Potential Cash Payment, Total | $ 168,569 | $ 111,732

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: | debit
Period Type: | instant