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Loss Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Earnings Per Share [Abstract] |  |  |  |  |
Income from continuing operations | $ (32,471) | $ (5,166) | $ (52,478) | $ 2,489 |
Numerator |  |  |  |  |
Net income attributable to the noncontrolling interests | (1,059) | (2,122) | (3,172) | (7,343) | $ (9,054)
Income (Loss) from Continuing Operations Attributable to Parent | (33,530) | (7,288) | (55,650) | (4,854) |
Effect of dilutive securities | 0 | 0 | 0 | 0 |
Income (Loss) from Continuing Operations Attributable to Parent, Diluted | $ (33,530) | $ (7,288) | $ (55,650) | $ (4,854) |
Denominator |  |  |  |  |
Denominator for basic loss per common share - weighted average common shares | 52,244,819 | 49,915,807 | 50,861,890 | 49,843,980 |
Effect of dilutive securities | 0 | 0 | 0 | 0 |
Denominator for diluted loss per common share - adjusted weighted shares and assumed conversions | 52,244,819 | 49,915,807 | 50,861,890 | 49,843,980 |
Income (loss) from continuing operations attributable to MDC Partners Inc. common shareholders (usd per share) | $ (0.64) | $ (0.15) | $ (1.09) | $ (0.10) |
Income (loss) from continuing operations attributable to MDC Partners Inc. common shareholders (usd per share) | $ (0.64) | $ (0.15) | $ (1.09) | $ (0.10) |

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- Definition Amount of income (loss) from continuing operations attributable to the parent, and includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. + References No definition available. + Details
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- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the assumed exercise stock options, restrictive stock units (RSUs), convertible preferred stock of an employee stock ownership plan (ESOP), and other dilutive convertible securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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