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Income Taxes - Schedule of Changes in Tax Reserve (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax Reserve [Roll Forward] |  |  |
Beginning Balance | $ 3,605 | $ 3,073 | $ 3,073
Charges to income tax expense | (1,261) | (960) | 0
Settlement of uncertainty | (879) | (428) |
Ending Balance | $ 1,465 | $ 3,605 | $ 3,073

X
- Definition Income tax expense charge incurred during the period to increase tax reserve. + References No definition available. + Details
Name: | mdca_ChargesOfIncomeTaxExpense
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from all currently nondeductible expenses reflected in all reserves and accrued liabilities, which can only be deducted for tax purposes when relevant losses are realized or relevant obligations are actually incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken. + References No definition available. + Details
Name: | mdca_IncomeTaxReserve
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Income Tax Reserve [Roll Forward] + References No definition available. + Details
Name: | mdca_IncomeTaxReserveRollForward
Namespace Prefix: | mdca_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Settlements of uncertainty expenses incurred during the period which resulted in a decrease in tax reserve. + References No definition available. + Details
Name: | mdca_SettlementOfUncertainty
Namespace Prefix: | mdca_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration