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Acquisitions - Schedule of Net Income (Loss) Attributable to Parent and Transfers (to) from Noncontrolling Interest (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net loss attributable to MDC Partners Inc. | $ (26,222) | $ (8,604) | $ 29,560 | $ (32,091) | $ (26,759) | $ (4,922) | $ 16,470 | $ (8,846) | $ (37,357) | $ (24,057) | $ (148,863)
Transfers (to) from the noncontrolling interests |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Noncontrolling Interests from Business Acquisitions |  |  |  |  |  |  |  |  | (51,488) | (17,831) | (4,939)
Change from net loss attributable to MDC Partners Inc. and transfers (to) from noncontrolling interests |  |  |  |  |  |  |  |  | (80,137) | (33,049) | (137,789)
Additional Paid-in Capital [Member] |  |  |  |  |  |  |  |  |  |  |
Transfers (to) from the noncontrolling interests |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Noncontrolling Interests from Business Acquisitions |  |  |  |  |  |  |  |  | $ (42,780) | $ (8,992) | $ 11,074

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