UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Services	$ 362,130	$ 379,743	$ 690,921	$ 706,711
Operating expenses:
Cost of services sold	240,749	253,390	477,903	496,420
Office and general expenses	87,276	83,878	154,394	167,757
Depreciation and amortization	10,663	11,703	19,501	24,078
Other asset impairment	0	0	0	2,317
Costs and Expenses, Total	338,688	348,971	651,798	690,572
Operating income (loss)	23,442	30,772	39,123	16,139
Other income (expense):
Interest expense and finance charges, net	(16,413)	(16,859)	(33,174)	(32,942)
Other, net	(746)	592	(4,128)	1,033
Foreign exchange transaction gain (loss)	2,932	(6,549)	8,374	(13,209)
Nonoperating Income (Expense), Total	(14,227)	(22,816)	(28,928)	(45,118)
Income (loss) before income taxes and equity in earnings of non-consolidated affiliates	9,215	7,956	10,195	(28,979)
Income tax expense (benefit)	2,088	1,977	2,835	(6,353)
Income (loss) before equity in earnings of non-consolidated affiliates	7,127	5,979	7,360	(22,626)
Equity in earnings of non-consolidated affiliates	206	(28)	289	58
Net income (loss)	7,333	5,951	7,649	(22,568)
Net income attributable to the noncontrolling interests	(3,043)	(2,545)	(3,472)	(3,442)
Net loss attributable to MDC Partners Inc.	$ 4,290	3,406	$ 4,177	$ (26,010)
Accretion on convertible preference shares		$ 2,273
Basic and diluted
Income (Loss) from Continuing Operations, Per Diluted Share	$ 0.01	$ 0.02	$ (0.02)	$ (0.53)
Weighted Average Number of Common Shares Outstanding:
Weighted Average Number of Shares Outstanding, Basic	71,915,832	57,439,823	66,118,749	56,924,208
Weighted Average Number of Shares Outstanding, Diluted	72,024,689	57,802,872	66,118,749	56,924,208
Stock-based compensation	$ 3,634	$ 5,603	$ 6,606	$ 10,640
Cost of services sold
Weighted Average Number of Common Shares Outstanding:
Stock-based compensation	2,442	4,047	6,987	7,394
Office and general expenses
Weighted Average Number of Common Shares Outstanding:
Stock-based compensation	1,192	$ 1,556	$ (381)	3,246
Series 4 Convertible Preferred Stock [Domain] | Preferred Stock
Other income (expense):
Accretion on convertible preference shares	$ 3,515			$ 4,095