Document And Entity Information	6 Months Ended
	Jun. 30, 2014	Jul. 28, 2014 Common Class A	Jul. 28, 2014 Common Class B
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		50,401,425	3,755
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2014
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2014