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Segment Information (Details 1) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) operating_segment reportable_segment	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | reportable_segment	2
Number of operating segments | operating_segment	4
Revenue	$ 327,742	$ 328,791
Segment operating income (loss)	29,329	15,682
Interest expense and finance charges	(15,612)	(16,760)
Foreign exchange gain (loss)	(14,757)	5,442
Other, net	16,334	(3,383)
Income (loss) before income taxes and equity in earnings of non-consolidated affiliates	15,294	981
Income tax expense	13,500	748
Income before equity in earnings of non-consolidated affiliates	1,794	233
Equity in earnings of non-consolidated affiliates	0	83
Net income	1,794	316
Net income attributable to the noncontrolling interest	(791)	(429)	$ (16,156)
Net income (loss) attributable to MDC Partners Inc.	1,003	(113)
Depreciation and amortization	9,206	8,838
Stock-based compensation	3,070	2,972
Capital expenditures	1,546	3,606
Global Integrated Agencies
Segment Reporting Information [Line Items]
Revenue	208,328	206,910
Segment operating income (loss)	29,193	15,512
Depreciation and amortization	6,267	5,715
Stock-based compensation	2,861	4,459
Capital expenditures	835	3,049
Media Services
Segment Reporting Information [Line Items]
Revenue	41,058	43,232
Segment operating income (loss)	617	(1,649)
Depreciation and amortization	808	993
Stock-based compensation	(13)	0
Capital expenditures	86	138
All Other
Segment Reporting Information [Line Items]
Revenue	78,356	78,649
Segment operating income (loss)	7,857	6,641
Depreciation and amortization	1,899	1,913
Stock-based compensation	80	86
Capital expenditures	323	418
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Segment operating income (loss)	(8,338)	(4,822)
Depreciation and amortization	232	217
Stock-based compensation	142	(1,573)
Capital expenditures	$ 302	$ 1

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