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Fair Value Measurements (Details) (6.75% Notes, USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Mar. 31, 2015
Dec. 31, 2014
Liabilities:      
Debt instrument, stated interest rate 6.75%us-gaap_DebtInstrumentInterestRateStatedPercentage    
Fair Value, Inputs, Level 1      
Liabilities:      
Long term debt, Carrying Amount   $ 741,722us-gaap_LongTermDebt
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_LongtermDebtTypeAxis
= mdca_SixPointSevenFivePercentageNotesMember		 $ 742,017us-gaap_LongTermDebt
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_LongtermDebtTypeAxis
= mdca_SixPointSevenFivePercentageNotesMember
Long term debt, Fair Value   $ 773,588us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_LongtermDebtTypeAxis
= mdca_SixPointSevenFivePercentageNotesMember		 $ 751,538us-gaap_LongTermDebtFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_LongtermDebtTypeAxis
= mdca_SixPointSevenFivePercentageNotesMember