UNAUDITED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Comprehensive income (loss)
Net loss	$ (13,667)	$ 21,984	$ (36,235)	$ 25,768
Other comprehensive income (loss), net of applicable tax:
Foreign currency translation adjustment	1,327	1,912	898	1,294
Other comprehensive income (loss)	(1,327)	(1,912)	(898)	(1,294)
Comprehensive income (loss) for the period	(14,994)	20,072	(37,133)	24,474
Comprehensive income attributable to the noncontrolling interests	(2,931)	(4,695)	(4,367)	(9,063)
Comprehensive income (loss) attributable to MDC Partners Inc.	$ (17,925)	$ 15,377	$ (41,500)	$ 15,411