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Income Taxes - Textual (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax [Line Items] |  |  |
Non-deductible stock-based compensation | $ 1,982 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | $ 24,357 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | $ 7,699 us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Change to valuation allowance on items affecting taxable income | 2,003 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 6,952 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 15,682 us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
Effect of the difference in federal and statutory rates | 2,222 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (15)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (793)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential
Income taxes receivable | 235 us-gaap_IncomeTaxReceivable | 533 us-gaap_IncomeTaxReceivable |
Taxes payable | 5,368 us-gaap_TaxesPayableCurrentAndNoncurrent | 4,907 us-gaap_TaxesPayableCurrentAndNoncurrent |
Deferred tax liability accrued and other liabilities | 47 mdca_DeferredTaxLiabilityAccruedAndOtherLiabilities | 55 mdca_DeferredTaxLiabilityAccruedAndOtherLiabilities |
Deferred tax assets other current assets | 6,722 mdca_DeferredTaxAssetsOtherCurrentAssets | 2,249 mdca_DeferredTaxAssetsOtherCurrentAssets |
Operating loss carryforwards expiration period | 2015 through 2031 |  |
Indefinite loss carryforwards | 131,758 mdca_IndefiniteLossCarryForwards |  |
Valuation allowance, deferred tax asset, increase (decrease), amount | 2,003 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 6,952 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | 15,682 us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount
Pension and other postretirement benefit plans, tax | 1,112 us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax | (1,112)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax |
Unrecognized tax benefits | 4,166 us-gaap_UnrecognizedTaxBenefits | 4,166 us-gaap_UnrecognizedTaxBenefits |
Unrecognized tax benefits, income tax penalties and interest accrued | 1,093 us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued |  |
United States |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards | 51,043 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = country_US |  |
Indefinite loss carryforwards | 36,052 mdca_IndefiniteLossCarryForwards / us-gaap_IncomeTaxAuthorityAxis = country_US |  |
Foreign Tax Authority |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards | 52,139 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_ForeignCountryMember |  |
Canadian [Member] |  |  |
Income Tax [Line Items] |  |  |
Indefinite loss carryforwards | 95,706 mdca_IndefiniteLossCarryForwards / us-gaap_IncomeTaxAuthorityAxis = mdca_CanadianMember |  |
State and Local Jurisdiction [Member] |  |  |
Income Tax [Line Items] |  |  |
Operating loss carryforwards | 144,622 us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |
Canada Revenue Agency [Member] |  |  |
Income Tax [Line Items] |  |  |
Effect of the difference in federal and statutory rates | $ 2,222 us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential / us-gaap_IncomeTaxAuthorityNameAxis = us-gaap_CanadaRevenueAgencyMember |  |

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- Definition Carrying amount as of the balance sheet date of income taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. Also called income tax refund receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 8 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Subparagraph c -Article 7 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=37586315&loc=d3e32123-109318 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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