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Acquisitions (Details Textual) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013 | Jan. 01, 2014 | Feb. 14, 2014 | Aug. 01, 2014 | Aug. 18, 2014 | Jun. 03, 2014 | Jul. 31, 2014
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Increase (Decrease) In Contingent Purchase Price Obligation | $ 2,248 mdca_BusinessAcquisitionIncreaseDecreaseInContingentPurchasePriceObligation | $ 8,022 mdca_BusinessAcquisitionIncreaseDecreaseInContingentPurchasePriceObligation |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Fair Value | 202,338 us-gaap_RedeemableNoncontrollingInterestEquityFairValue | 194,951 us-gaap_RedeemableNoncontrollingInterestEquityFairValue | 194,951 us-gaap_RedeemableNoncontrollingInterestEquityFairValue | 148,534 us-gaap_RedeemableNoncontrollingInterestEquityFairValue |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Parent | 100.00%us-gaap_MinorityInterestOwnershipPercentageByParent |  |  |  |  |  |  |  |  |
Aggregate 2014 Acquisitions [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  | 151,202 mdca_BusinessAcquisitionCostOfAcquiredEntityPurchasePrice1 / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid |  |  | 67,236 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Business Acquisition, Deferred Acquisition Consideration |  |  | 83,966 mdca_BusinessAcquisitionDeferredAcquisitionConsideration / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets |  |  | 61,906 mdca_BusinessAcquisitionPurchasePriceAllocationAmortizedIntangibleAssets / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Goodwill Amount |  |  | 149,234 mdca_BusinessAcquisitionPurchasePriceAllocationGoodwill / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Nonredeemable Noncontrolling Interest |  |  | 50,552 us-gaap_NonredeemableNoncontrollingInterest / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Fair Value |  |  | 13,327 us-gaap_RedeemableNoncontrollingInterestEquityFairValue / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Business Acquisition Purchase Price Allocation Intangibles and Goodwill Expected Tax Deductible Amount |  |  | 149,232 mdca_BusinessAcquisitionPurchasePriceAllocationIntangiblesAndGoodwillExpectedTaxDeductibleAmount / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember |  |  |  |  |  |  |
Aggregate 2014 Acquisitions [Member] | Luntz Global Partners L L C |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  | 60.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember / dei_LegalEntityAxis = mdca_LuntzGlobalPartnersLLCMember |  |  |  |  |
Aggregate 2014 Acquisitions [Member] | Kingsdale Partners LP |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  | 65.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember / dei_LegalEntityAxis = mdca_KingsdalePartnersLpMember |  |  |  |
Aggregate 2014 Acquisitions [Member] | Hunter PR LLC [Member] [Domain] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  | 65.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember / dei_LegalEntityAxis = mdca_HunterPRLLCMemberDomain |  |  |
Aggregate 2014 Acquisitions [Member] | Albion Brand Communications Limited [Member] [Domain] [Domain] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  | 75.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember / dei_LegalEntityAxis = mdca_AlbionBrandCommunicationsLimitedMemberDomainDomain |  |
Aggregate 2014 Acquisitions [Member] | The House Worldwide Ltd [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = mdca_Aggregate2014AcquisitionsMember / dei_LegalEntityAxis = mdca_TheHouseWorldwideLtdMember |
Trapeze Media Limited | Union Advertising Canada LC [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  |  |  |  |  |  | 100.00%us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired / us-gaap_BusinessAcquisitionAxis = mdca_TrapezeMediaLimitedMember / dei_LegalEntityAxis = mdca_UnionAdvertisingCanadaLCMember
Union Advertising Canada LC [Member] | Trapeze Media Limited |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business Combination, Step Acquisition Gain on sale of ownership percentage |  |  | $ 908 mdca_BusinessCombinationStepAcquisitionGainonsaleofownershippercentage / us-gaap_BusinessAcquisitionAxis = mdca_TrapezeMediaLimitedMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mdca_UnionAdvertisingCanadaLCMember |  |  |  |  |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners |  |  |  |  |  |  |  |  |  | 18.00%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners / us-gaap_BusinessAcquisitionAxis = mdca_TrapezeMediaLimitedMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = mdca_UnionAdvertisingCanadaLCMember
Minimum [Member] | Aggregate 2014 Acquisitions [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 5 years |  |  |  |  |  |  |  |  |
Maximum [Member] | Aggregate 2014 Acquisitions [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 6 years |  |  |  |  |  |  |  |  |

X
- Definition The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. + References No definition available. + Details
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- Definition The change in the estimated value of contingent purchase price obligations that are remeasured and adjusted through operating profit. + References No definition available. + Details
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- Definition The amount of acquisition cost of a business combination allocated to an identifiable intangible asset that will be amortized. + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition The aggregate fair value as of the reporting date of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (16)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (12)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 + Details
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