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    <link:label id="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0BF8FF2FB709B7D1682BBA819B8F471B_verboseLabel_en-US" xlink:label="lab_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_0BF8FF2FB709B7D1682BBA819B8F471B" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Denominator for basic loss per common share - weighted average common shares</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeLossFromEquityMethodInvestments_6BF91BBFE2921AEDB8FEC52A97812C56" xlink:to="lab_us-gaap_IncomeLossFromEquityMethodInvestments_6BF91BBFE2921AEDB8FEC52A97812C56" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_DC3165860352269D30D2C52A978131C6_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_DC3165860352269D30D2C52A978131C6" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other non-current assets and liabilities</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_DC3165860352269D30D2C52A978131C6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_DC3165860352269D30D2C52A978131C6" xlink:to="lab_us-gaap_IncreaseDecreaseInOtherNoncurrentAssetsAndLiabilitiesNet_DC3165860352269D30D2C52A978131C6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_B2AEC3F163812697244AC52A9781F303_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_B2AEC3F163812697244AC52A9781F303" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Foreign exchange</link:label>
    <link:label id="lab_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_B2AEC3F163812697244AC52A9781F303_label_en-US" xlink:label="lab_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_B2AEC3F163812697244AC52A9781F303" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Foreign Currency Transaction Gain (Loss), Unrealized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealized" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossUnrealized_B2AEC3F163812697244AC52A9781F303" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4CB4D512CC7666BE0F61C52A9781BC17_verboseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4CB4D512CC7666BE0F61C52A9781BC17" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Changes in working capital:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4CB4D512CC7666BE0F61C52A9781BC17" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_1DEB6D4049DFE0501C02C52A9781D5C8_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_1DEB6D4049DFE0501C02C52A9781D5C8" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_1DEB6D4049DFE0501C02C52A9781D5C8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_1DEB6D4049DFE0501C02C52A9781D5C8" xlink:to="lab_us-gaap_IncreaseDecreaseInAccountsReceivable_1DEB6D4049DFE0501C02C52A9781D5C8" xlink:type="arc" />
    <link:label id="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_334F63A575DB2D0C5750C52A97824256_negatedTerseLabel_en-US" xlink:label="lab_mdca_IncreaseDecreaseInExpendituresBillableToClients_334F63A575DB2D0C5750C52A97824256" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Expenditures billable to clients</link:label>
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    <link:loc xlink:href="mdca-20170331.xsd#mdca_IncreaseDecreaseInExpendituresBillableToClients" xlink:label="loc_mdca_IncreaseDecreaseInExpendituresBillableToClients_334F63A575DB2D0C5750C52A97824256" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_0FAA3D22DFAB232FF96EC52A978279B0" xlink:type="locator" />
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    <link:label id="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_33415019CE2AE7D2FADBC52A97823018_terseLabel_en-US" xlink:label="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_33415019CE2AE7D2FADBC52A97823018" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable, accruals and other liabilities</link:label>
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    <link:label id="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_33415019CE2AE7D2FADBC52A97823018_documentation_en-US" xlink:label="lab_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_33415019CE2AE7D2FADBC52A97823018" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The net change during the reporting period in the aggregate amount of accounts payable accrued expenses and other liabilities incurred but not paid.</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities" xlink:label="loc_mdca_IncreaseDecreaseInAccountsPayableAccruedExpensesAndOtherLiabilities_33415019CE2AE7D2FADBC52A97823018" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_1B96E70122E88BC40023C52A9782A5D7_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInDeferredRevenue_1B96E70122E88BC40023C52A9782A5D7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Advance billings</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:label="loc_us-gaap_IncreaseDecreaseInDeferredRevenue_1B96E70122E88BC40023C52A9782A5D7" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_CF77E46ABF8E0F9AD8F3C52A9782377C_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_CF77E46ABF8E0F9AD8F3C52A9782377C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in operating activities</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_CF77E46ABF8E0F9AD8F3C52A9782377C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_CF77E46ABF8E0F9AD8F3C52A9782377C" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_CF77E46ABF8E0F9AD8F3C52A9782377C" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2F2D1D0E092181DEBB45C52A97826F9F_verboseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_2F2D1D0E092181DEBB45C52A97826F9F" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash flows used in investing activities:</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_17301A9376CF4A5935F3C52A97820560" xlink:type="locator" />
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    <link:label id="lab_mdca_DepositsToAcquirePropertyPlantandEquipment_E4BFAA56E2DFAB170FF3C52A9782F74A_documentation_en-US" xlink:label="lab_mdca_DepositsToAcquirePropertyPlantandEquipment_E4BFAA56E2DFAB170FF3C52A9782F74A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Deposits To Acquire Property Plant and Equipment</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DepositsToAcquirePropertyPlantandEquipment" xlink:label="loc_mdca_DepositsToAcquirePropertyPlantandEquipment_E4BFAA56E2DFAB170FF3C52A9782F74A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_ABC76A83F52259F4C988C52A97832719_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_ABC76A83F52259F4C988C52A97832719" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from issuance of 6.50% Notes</link:label>
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    <link:label id="lab_us-gaap_RepaymentsOfLinesOfCredit_142385739A7B3B9E6EA5C52A978363DF_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLinesOfCredit_142385739A7B3B9E6EA5C52A978363DF" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Repayments of revolving credit agreement</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_InterestPaid" xlink:label="loc_us-gaap_InterestPaid_D54C97C503170E63F319C52A969519A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InterestPaid_D54C97C503170E63F319C52A969519A7" xlink:to="lab_us-gaap_InterestPaid_D54C97C503170E63F319C52A969519A7" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateOne_851FA71E961DE709872DC52A9696776E_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateOne_851FA71E961DE709872DC52A9696776E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, One</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateOne_851FA71E961DE709872DC52A9696776E_label_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateOne_851FA71E961DE709872DC52A9696776E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, One</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateOne_851FA71E961DE709872DC52A9696776E_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateOne_851FA71E961DE709872DC52A9696776E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The first set in the series of latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity, which may be presented in a variety of ways (year only, month and year, day, month and year, quarter, etc.).</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentRedemptionDateOne" xlink:label="loc_mdca_DebtInstrumentRedemptionDateOne_851FA71E961DE709872DC52A9696776E" xlink:type="locator" />
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    <link:label id="lab_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, Two</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1_label_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, Two</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The second set in the series of latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity, which may be presented in a variety of ways (year only, month and year, day, month and year, quarter, etc.).</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentRedemptionDateTwo" xlink:label="loc_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1" xlink:to="lab_mdca_DebtInstrumentRedemptionDateTwo_3D4B54480BAE4D612BA4C52A9696D8E1" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date Three</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date Three</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date Three</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree" xlink:label="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914" xlink:to="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateThree_64910669928B2196B409C52A9696D914" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, Three</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5_label_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, Three</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, Three</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentRedemptionDateThree" xlink:label="loc_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5" xlink:to="lab_mdca_DebtInstrumentRedemptionDateThree_8EA9C972346634635D2CC52A9696F3B5" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, Latest For Redemption At Face Amount</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD_label_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Date, Latest For Redemption At Face Amount</link:label>
    <link:label id="lab_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity at face amount, which may be presented in a variety of ways (year only, month and year, day, month and year, quarter, etc.).</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount" xlink:label="loc_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD" xlink:to="lab_mdca_DebtInstrumentRedemptionDateLatestForRedemptionAtFaceAmount_96CC2A568A17CB4141A2C52A969A80CD" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date One</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date One</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage of the face amount applicable to the first set in the series of latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity.</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne" xlink:label="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29" xlink:to="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateOne_D51A79E6943666C68F9AC52A969B6D29" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date Two</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date Two</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage of the face amount applicable to the second set in the series of latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo" xlink:label="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A" xlink:to="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateTwo_4C189FE341D8E9E750B6C52A969B7B4A" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date, Latest For Redemption At Face Amount</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Redemption Date, Latest For Redemption At Face Amount</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt instrument, percentage of redemption price, redemption date, latest for redemption at face amount</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount" xlink:label="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029" xlink:to="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceRedemptionDateLatestForRedemptionAtFaceAmount_7B8E19B7A76AEEC3C1C4C52A969BA029" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional_B42BAE6396CCC772CDD0C52A969B5169_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional_B42BAE6396CCC772CDD0C52A969B5169" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Redeemable Redemption Date, Additional</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional_B42BAE6396CCC772CDD0C52A969B5169_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional_B42BAE6396CCC772CDD0C52A969B5169" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Redeemable Redemption Date, Additional</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional_B42BAE6396CCC772CDD0C52A969B5169_documentation_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional_B42BAE6396CCC772CDD0C52A969B5169" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The percentage of the face amount that can be redeemed, applicable to the additional set in the series of latest date, before maturity, on which the issuer can call the outstanding debt instrument for repayment or conversion to equity.</link:label>
    <link:loc xlink:href="mdca-20170331.xsd#mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional" xlink:label="loc_mdca_DebtInstrumentPercentageRedeemableRedemptionDateAdditional_B42BAE6396CCC772CDD0C52A969B5169" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_472160289B7CFB1A1163C52A969BB7E7_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_472160289B7CFB1A1163C52A969BB7E7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price Redemption Date, Additional</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_472160289B7CFB1A1163C52A969BB7E7_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_472160289B7CFB1A1163C52A969BB7E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_472160289B7CFB1A1163C52A969BB7E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_472160289B7CFB1A1163C52A969BB7E7" xlink:to="lab_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_472160289B7CFB1A1163C52A969BB7E7" xlink:type="arc" />
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_C3177B0AB09A903697D3C52A969B3CAE_terseLabel_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_C3177B0AB09A903697D3C52A969B3CAE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Change In Ownership Control</link:label>
    <link:label id="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_C3177B0AB09A903697D3C52A969B3CAE_label_en-US" xlink:label="lab_mdca_DebtInstrumentPercentageOfRedemptionPriceChangeInOwnershipControl_C3177B0AB09A903697D3C52A969B3CAE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Percentage Of Redemption Price, Change In Ownership Control</link:label>
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