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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2015
Dec. 31, 2014
Accounts receivable, allowance for doubtful accounts (in dollars) $ 1,436us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,409us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Accumulated depreciation (in dollars) $ 97,271us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment $ 95,083us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Shares to be issued, shares 0mdca_CommonStockIssuableSharesIssuable 0mdca_CommonStockIssuableSharesIssuable
Common Class A    
Common stock, shares issued 49,846,285us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember		 49,680,109us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common stock, shares outstanding 49,846,285us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember		 49,680,109us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common Class B    
Common stock, shares issued 3,755us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember		 3,755us-gaap_CommonStockSharesIssued
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
Common stock, shares outstanding 3,755us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember		 3,755us-gaap_CommonStockSharesOutstanding
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember