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UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Comprehensive income (loss)
Net income	$ 14,337	$ 2,506	$ 23,838	$ 4,299
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustment	195	1,367	(3,312)	8,796
Other comprehensive income (loss)	195	1,367	(3,312)	8,796
Comprehensive income for the period	14,532	3,873	20,526	13,095
Comprehensive income attributable to the noncontrolling interests	(8,570)	(3,511)	(12,109)	(3,793)
Comprehensive income attributable to MDC Partners Inc.	$ 5,962	$ 362	$ 8,417	$ 9,302

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