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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Comprehensive income (loss)
Net loss	$ (207,197)	$ 10,903	$ (118,222)
Other comprehensive income (loss), net of applicable tax:
Foreign currency translation adjustment	9,092	(6,691)	3,158
Benefit plan adjustment, net of income tax expense (benefit) of ($519) for 2020, ($740) for 2019 and $223 for 2018	(1,354)	(1,911)	555
Other comprehensive income (loss)	7,738	(8,602)	3,713
Comprehensive income (loss) for the period	(199,459)	2,301	(114,509)
Comprehensive income attributable to the noncontrolling interests	(22,504)	(16,543)	(8,824)
Comprehensive loss attributable to MDC Partners Inc.	$ (221,963)	$ (14,242)	$ (123,333)

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