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