Document And Entity Information (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Jun. 30, 2013
Feb. 26, 2014
Common Class A [Member]
Feb. 26, 2014
Common Class B [Member]
Document Information [Line Items]        
Entity Registrant Name MDC PARTNERS INC      
Entity Central Index Key 0000876883      
Current Fiscal Year End Date --12-31      
Entity Filer Category Accelerated Filer      
Trading Symbol MDCA      
Entity Common Stock, Shares Outstanding     50,272,247 3,755
Document Type 10-K      
Amendment Flag false      
Document Period End Date Dec. 31, 2013      
Document Fiscal Period Focus FY      
Document Fiscal Year Focus 2013      
Entity Well-known Seasoned Issuer No      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Public Float   $ 461