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New Accounting Pronouncements New Accounting Pronouncements (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of Change in Accounting Estimate [Table Text Block] | The following table summarizes the impact of adoption of ASC 606 on the Consolidated Statement of Operations during the twelve months ended December 31, 2018:
|  | Twelve Months Ended December 31, 2018
|  | As Reported |  | Adjustments |  | Adjusted to Exclude Adoption of ASC 606
Revenue - Services |  | $ | 1,476,203 |  |  | $ | 51,636 |  |  | $ | 1,527,839 |
Costs of services sold |  | $ | 991,198 |  |  | $ | 62,358 |  |  | $ | 1,053,556 |
Operating income (loss) |  | $ | 9,696 |  |  | $ | (10,722 | ) |  | $ | (1,026 | )
Net loss attributable to MDC Partners Inc. common shareholders |  | $ | (132,088 | ) |  | $ | (6,883 | ) |  | $ | (138,971 | )
Loss per common share - basic and diluted |  | $ | (2.31 | ) |  | $ | (0.12 | ) |  | $ | (2.43 | )

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- Definition Tabular disclosure of the change in an accounting estimate, including a change that occurs in an interim period. If a change in accounting estimate affects several future periods (for example, a change in the service life of a depreciable asset) disclose the effect on income from continuing operations, net income (or other appropriate captions of changes in the applicable net assets or performance indicator), and any related per-share amounts of the current period. Disclosure of the effects of a change in an accounting estimate that occurs in the ordinary course of business (such as uncollectible accounts or inventory obsolescence) is not required, unless the effect is material. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.10-01.(a)(5)) -URI http://asc.fasb.org/extlink&oid=27015980&loc=d3e46468-122699 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=109236672&loc=d3e777-108305 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22595-107794 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 45 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=115929471&loc=d3e21843-107793 + Details
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