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Goodwill and Intangible Assets - Textual (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]
Goodwill, impaired, accumulated impairment loss	$ 46,883us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Weighted average amortization period	6 years
Finite lived intangible assets amortization expenses	$ 29,749mdca_FiniteLivedIntangibleAssetsAmortizationExpenses	$ 18,456mdca_FiniteLivedIntangibleAssetsAmortizationExpenses	$ 26,074mdca_FiniteLivedIntangibleAssetsAmortizationExpenses
Other Intangible Assets
Goodwill [Line Items]
Weighted average amortization period	7 years
Customer Relationships
Goodwill [Line Items]
Weighted average amortization period	5 years

X

- Definition

Aggregate amount of intangible asset amortization recognized as expense during the period

+ References

No definition available.

+ Details

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Namespace Prefix:	mdca_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

This represents the weighted average amortization period of intangible assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	mdca_
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X

- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a,h)

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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- Details

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X

- Details

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- Details

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