    <SEC-DOCUMENT>0001104659-21-091375-index.html : 20210713
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    <ACCEPTANCE-DATETIME>20210712215100
    ACCESSION NUMBER:		0001104659-21-091375
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		20
    CONFORMED PERIOD OF REPORT:	20210712
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Other Events
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20210713
    DATE AS OF CHANGE:		20210712

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			MDC PARTNERS INC
    		CENTRAL INDEX KEY:			0000876883
    		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-ADVERTISING AGENCIES [7311]
    		IRS NUMBER:				980364441
    		STATE OF INCORPORATION:			A6
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13718
    		FILM NUMBER:		211086721

    	BUSINESS ADDRESS:
    		STREET 1:		ONE WORLD TRADE CENTER, FLOOR 65
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10007
    		BUSINESS PHONE:		646 429 1800

    	MAIL ADDRESS:
    		STREET 1:		ONE WORLD TRADE CENTER, FLOOR 65
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10007

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MDC CORP INC
    		DATE OF NAME CHANGE:	20001204

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MDC COMMUNICATIONS CORP
    		DATE OF NAME CHANGE:	19961028

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	MDC CORPORATION
    		DATE OF NAME CHANGE:	19950419
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    <SEQUENCE>1
    <FILENAME>tm2120667d2_8k.htm
    <DESCRIPTION>FORM 8-K
    <TEXT>
    Document 1 - file: tm2120667d2_8k.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>tm2120667d2_ex99-1.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: tm2120667d2_ex99-1.htm

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    <TYPE>EX-99.2
    <SEQUENCE>3
    <FILENAME>tm2120667d2_ex99-2.htm
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    <FILENAME>mdca-20210712.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
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    <SEQUENCE>5
    <FILENAME>mdca-20210712_lab.xml
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    <TEXT>
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    <SEQUENCE>8
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    <SEQUENCE>9
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    <SEQUENCE>10
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    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>tm2120667d2_ex99-1img1.jpg
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    <SEQUENCE>12
    <FILENAME>image_001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <SEQUENCE>13
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    <SEQUENCE>14
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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>15
    <FILENAME>Financial_Report.xlsx
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    <SEQUENCE>16
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    <SEQUENCE>17
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>18
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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>20
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    <SEQUENCE>21
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