Segment Information (Tables)

12 Months Ended

Dec. 31, 2012

Schedule of Segment Reporting Information, by Segment [Table Text Block]

The significant accounting policies of these segments are the same as those described in the summary of significant accounting policies included in the notes to the consolidated financial statements. The Company continues to evaluate its Corporate Group and the services provided by the Corporate Group to the operating segments. The Company will continue to evaluate the services and amount of time spent directly on the operating segments business operations, and adjust accordingly.

	For the Year Ended December 31, 2012
	Strategic Marketing Services		Performance Marketing Services		Corporate		Total
Revenue	$	719,364	$	345,645	$	—	$	1,065,009
Cost of services sold		479,060		255,080		—		734,140
Office and general expenses		188,954		72,780		38,847		300,581
Depreciation and amortization		27,260		17,217		1,342		45,819
Operating profit (Loss)		24,090		568		(40,189)		(15,531)
Other income (Expense):
Other income, net								117
Foreign exchange loss								(976)
Interest expense, net								(46,190)
Loss from continuing operations before income taxes, equity in affiliates								(62,580)
Income tax expense								9,553
Loss from continuing operations before equity in affiliates								(72,133)
Equity in earnings of affiliates								633
Loss from continuing operations								(71,500)
Loss from discontinued operations attributable to MDC Partners Inc., net of taxes								(7,201)
Net loss								(78,701)
Net income attributable to noncontrolling interests		(5,167)		(1,571)		—		(6,738)
Net loss attributable to MDC Partners Inc.							$	(85,439)
Stock-based compensation	$	9,186	$	8,227	$	14,784	$	32,197
Capital expenditures from continuing operations	$	11,455	$	8,466	$	382	$	20,303
Goodwill and intangibles	$	532,643	$	250,671	$	—	$	783,314
Total assets	$	827,248	$	397,450	$	120,247	$	1,344,945

	For the Year Ended December 31, 2011
	Strategic Marketing Services		Performance Marketing Services		Corporate		Total
Revenue	$	608,022	$	328,970	$	—	$	936,992
Cost of services sold		425,316		242,346		—		667,662
Office and general expenses		137,824		44,512		35,432		217,768
Depreciation and amortization		22,378		16,471		826		39,675
Operating profit (Loss)		22,504		25,641		(36,258)		11,887
Other income (Expense):
Other income, net								116
Foreign exchange loss								(1,677)
Interest expense, net								(41,561)
Loss from continuing operations before income taxes, equity in affiliates								(31,235)
Income tax expense								41,735
Loss from continuing operations before equity in affiliates								(72,970)
Equity in earnings of affiliates								213
Loss from continuing operations								(72,757)
Loss from discontinued operations attributable to MDC Partners Inc., net of taxes								(3,506)
Net loss								(76,263)
Net income attributable to noncontrolling interests		(6,414)		(1,997)		—		(8,411)
Net loss attributable to MDC Partners Inc.							$	(84,674)
Stock-based compensation	$	5,149	$	3,695	$	14,813	$	23,657
Capital expenditures from continuing operations	$	11,647	$	4,782	$	6,929	$	23,358
Goodwill and intangibles	$	426,034	$	237,190	$	—	$	663,224
Total assets	$	627,268	$	380,825	$	47,652	$	1,055,745

	For the Year Ended December 31, 2010
	Strategic Marketing Services		Performance Marketing Services		Corporate		Total
Revenue	$	438,941	$	249,885	$	—	$	688,826
Cost of services sold		288,916		183,202		—		472,118
Office and general expenses		90,495		38,230		22,291		151,016
Depreciation and amortization		17,917		15,873		368		34,158
Operating Profit (Loss)		41,613		12,580		(22,659)		31,534
Other Income (Expense):
Other expense, net								381
Foreign exchange gain								69
Interest expense, net								(33,192)
Loss from continuing operations before income taxes, equity in affiliates								(1,208)
Income tax expense								(165)
Loss from continuing operations before equity in affiliates								(1,043)
Equity in loss of affiliates								866
Loss from continuing operations								(177)
Loss from discontinued operations attributable to MDC Partners Inc., net of taxes								(4,885)
Net loss								(5,062)
Net income attributable to noncontrolling interests		(7,211)		(3,167)		—		(10,378)
Net loss attributable to MDC Partners Inc.							$	(15,440)
Stock-based compensation	$	7,282	$	1,992	$	7,233	$	16,507
Capital expenditures from continuing operations	$	6,476	$	4,010	$	610	$	11,096
Goodwill and intangibles	$	367,856	$	213,765	$	—	$	581,621
Total assets	$	552,383	$	322,520	$	39,445	$	914,348

Schedule Of Fixed Assets Goodwill Intangibles Net [Table Text Block]

A summary of the Company’s long-lived assets, comprised of fixed assets, goodwill and intangibles, net, as at December 31, is set forth in the following table.

	United States		Canada		Other		Total
Long-lived Assets
2012	$	45,068	$	6,145	$	1,701	$	52,914
2011	$	39,555	$	7,003	$	1,179	$	47,737
Goodwill and Intangible Assets
2012	$	698,083	$	85,231	$	—	$	783,314
2011	$	577,388	$	85,836	$	—	$	663,224

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

A summary of the Company’s revenue as at December 31 is set forth in the following table.

	United States		Canada		Other		Total
Revenue:
2012	$	862,611	$	149,807	$	52,591	$	1,065,009
2011	$	751,875	$	152,374	$	32,743	$	936,992
2010	$	573,723	$	97,452	$	17,651	$	688,826

- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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