CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue:
Services	$ 336,606	$ 299,356	$ 638,828	$ 574,210
Operating Expenses:
Cost of services sold	225,042	188,875	435,461	370,343
Office and general expenses	53,075	71,436	127,383	142,772
Depreciation and amortization	14,007	9,917	26,307	20,399
Costs and Expenses, Total	292,124	270,228	589,151	533,514
Operating profit	44,482	29,128	49,677	40,696
Other Income (Expense):
Other, net	4,348	7,564	(13,692)	993
Interest expense and finance charges	(13,288)	(13,882)	(28,384)	(26,641)
Interest income	105	42	224	182
Nonoperating Income (Expense), Total	(8,835)	(6,276)	(41,852)	(25,466)
Income from continuing operations before income taxes and equity in non-consolidated affiliates	35,647	22,852	7,825	15,230
Income tax expense	4,679	3,376	625	3,030
Income from continuing operations before equity in non-consolidated affiliates	30,968	19,476	7,200	12,200
Equity in earnings of non-consolidated affiliates	104	79	455	142
Income from continuing operations	31,072	19,555	7,655	12,342
Income (loss) from discontinued operations attributable to MDC Partners Inc., net of taxes	1,329	(1,336)	(4,965)	(1,607)
Net income	32,401	18,219	2,690	10,735
Net income attributable to the noncontrolling interests	(2,841)	(1,749)	(5,221)	(3,111)
Net income (loss) attributable to MDC Partners Inc.	$ 29,560	$ 16,470	$ (2,531)	$ 7,624
Basic
Loss from continuing operations attributable to MDC Partners Inc. common shareholders (usd per share)	$ 0.57	$ 0.36	$ 0.05	$ 0.19
Discontinued operations attributable to MDC Partners Inc. common shareholders (usd per share)	0.03	(0.03)	(0.10)	(0.03)
Net loss attributable to MDC Partners Inc. common shareholders (usd per share)	0.60	0.33	(0.05)	0.16
Earnings Per Share, Diluted	$ 0.59	$ 0.32	$ (0.05)	$ 0.15
Weighted Average Number of Common Shares Outstanding:
Basic (USD per share)	49,859,300	49,546,062	49,807,419	49,442,770
Diluted (USD per share)	50,399,936	50,195,321	50,365,119	50,106,545
Share-based Compensation [Abstract]
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.03	$ (0.03)	$ (0.10)	$ (0.03)
Cost of services sold	$ 3,950	$ 2,227	$ 6,688	$ 4,754
Office and general expenses	1,364	2,201	3,071	4,042
Total	$ 5,314	$ 4,428	$ 9,759	$ 8,796