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Document And Entity Information	6 Months Ended
	Jun. 30, 2013	Jul. 24, 2013 Common Class A [Member]	Jul. 24, 2013 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		32,097,052	2,503
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2013
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2013

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