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Goodwill and Intangible Assets - Schedule of Goodwill (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Goodwill [Roll Forward] |  |
Beginning Balance | $ 744,333 us-gaap_Goodwill | $ 720,071 us-gaap_Goodwill
Acquired goodwill | 149,234 us-gaap_GoodwillAcquiredDuringPeriod | 35,956 us-gaap_GoodwillAcquiredDuringPeriod
Acquisition purchase price adjustments |  | (6,474)us-gaap_GoodwillPurchaseAccountingAdjustments
Foreign currency translation | (11,318)us-gaap_GoodwillTranslationAdjustments | (5,220)us-gaap_GoodwillTranslationAdjustments
Discontinued operations | (27,706)mdca_GoodwillDiscontinuedOperation |
Goodwill, Other Changes | (3,170)us-gaap_GoodwillOtherChanges |
Ending Balance | 851,373 us-gaap_Goodwill | 744,333 us-gaap_Goodwill
Strategic Marketing Services |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 477,405 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember | 483,760 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember
Acquired goodwill | 50,668 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember | 0 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember
Acquisition purchase price adjustments |  | (3,981)us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember
Foreign currency translation | (5,278)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember | (2,374)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember
Discontinued operations | 0 mdca_GoodwillDiscontinuedOperation / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember |
Goodwill, Other Changes | (7,263)us-gaap_GoodwillOtherChanges / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember |
Ending Balance | 515,532 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember | 477,405 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_StrategicMarketingServicesMember
Performance Marketing Services |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 266,928 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember | 236,311 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember
Acquired goodwill | 98,566 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember | 35,956 us-gaap_GoodwillAcquiredDuringPeriod / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember
Acquisition purchase price adjustments |  | (2,493)us-gaap_GoodwillPurchaseAccountingAdjustments / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember
Foreign currency translation | (6,040)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember | (2,846)us-gaap_GoodwillTranslationAdjustments / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember
Discontinued operations | (27,706)mdca_GoodwillDiscontinuedOperation / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember |
Goodwill, Other Changes | 4,093 us-gaap_GoodwillOtherChanges / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember |
Ending Balance | $ 335,841 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember | $ 266,928 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = mdca_PerformanceMarketingServicesMember

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- Definition Amount after accumulated impairment loss of 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 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 + Details
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- Definition Amount of increase (decrease) from foreign currency translation adjustments of 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 (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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