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Acquisitions (Details Textual) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |
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Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011 | Jun. 30, 2012 Acqusitions Actual [Member] | Dec. 31, 2011 Acqusitions Actual [Member] | Jun. 30, 2012 Acqusitions Actual [Member] | Jun. 30, 2012 Maximum [Member] | Dec. 31, 2011 Maximum [Member] | Jun. 30, 2012 Minimum [Member] | Dec. 31, 2011 Minimum [Member]
Sales Revenue, Services, Net | $ 274,102 | $ 238,020 | $ 509,758 | $ 453,111 |  | $ 28,515 | $ 68,869 | $ 30,463 |  |  |  |
Net Income (Loss) Attributable to Parent | (20,114) | 1,323 | (46,395) | (7,360) |  | 1,333 | 7,219 | 1,051 |  |  |  |
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents | 57,833 |  | 57,833 |  |  |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables | 60,568 |  | 60,568 |  | 35,200 |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Current Liabilities | 111,358 |  | 111,358 |  |  |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Purchase Price | 96,475 |  | 96,475 |  | 107,575 |  |  |  |  |  |  |
Business Acquisition, Cost of Acquired Entity, Cash Paid | 21,288 |  | 21,288 |  | 44,953 |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets | 21,581 |  | 21,581 |  | 13,639 |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Goodwill Amount | 131,985 |  | 131,985 |  | 85,463 |  |  |  |  |  |  |
Business Acquisition Purchase Price Allocation Intangibles And Goodwill Expected Tax Deductible Amount | 131,985 |  | 131,985 |  | 69,359 |  |  |  |  |  |  |
Intangible Assets Amortization Period (in years) |  |  |  |  |  |  |  |  | 7 | 8 | 5 | 5
Reduction to Short Term Noncontrolling Interest | 422 |  | 422 |  |  |  |  |  |  |  |  |
Net Increase (Decrease) in Redeemable Noncontrolling Interest | 142 |  | 142 |  | (7,922) |  |  |  |  |  |  |
Step Up Adjsutment to Paid in Captial | 3,501 |  | 3,501 |  | 7,475 |  |  |  |  |  |  |
Business Acquisition Deferred Acqusition Consideration | 75,187 |  | 75,187 |  | 62,622 |  |  |  |  |  |  |
Significant Acquisitions and Disposals, Description |  |  | During 2012, the Company completed a number of transactions. Effective March 28, 2012, MDC invested in Doner Partners LLC ("Doner"). The Company acquired a 30% voting interest and a convertible preferred interest that allows the Company to increase ordinary voting ownership to 70% at MDC's option, at no additional cost to the Company. Doner is a full service integrated creative agency. In addition, the Company acquired a 70% interest in TargetCast LLC ("TargetCast"). TargetCast is a full service media agency that expands our media strategy and activation offerings. The Company acquired a 51% interest in Dotbox LLC ("Dotbox"). The Dotbox acquisition forms the foundation for a potential e-commerce solution within the network. Doner and Dotbox are now included in the Company's Strategic Marketing Services segment, while TargetCast is included in the Company's Performance Marketing Group segment. During the 6 months, the Company also entered into immaterial transactions with certain majority owned entities. |  | During 2011, the Company completed a number of acquisitions. The Company, through a wholly-owned subsidiary, acquired substantially all of the assets of RJ Palmer LLC and a 75% interest in Trade X Partners LLC ("Trade X"). These acquisitions expand the Company's portfolio with another full service media buying agency as well as provide corporate bartering services to clients and are included in the Performance Marketing Services segment. The Company also entered into a transaction through its subsidiary Kwittken PR LLC ("Kwittken") which acquired 100% of Epoch PR Limited. Epoch is a communications and PR agency and expands Kwittken's capabilities to London and is included in the Strategic Marketing Services segment. The Company also acquired a 51% interest in AIC Publishing Services LP ("AIC. The Company, through a wholly-owned subsidiary, purchased a 70% interest in Concentric Partners, LLC ("Concentric") and a 65% interest in Laird + Partners, New York LLC ("Laird"). The Concentric acquisition is expected to serve as the foundation of the Company's healthcare platform. The Laird acquisition increases the Company's positioning in the luxury goods and retail marketplace. Concentric and Laird are now included in the Company's Strategic Marketing Services segment. The Company, through a wholly-owned subsidiary, purchased 60% of the total outstanding membership interests in Anomaly Partners, LLC ("Anomaly"). This acquisition expands the Company's portfolio with another creatively driven agency brand with an international presence. Anomaly is now included in the Company's Strategic Marketing Services segment. The company also completed a number of immaterial transactions with certain majority owned entities. |  |  |  |  |  |  |
Business Acquisition, Purchase Price Allocation, Current Liabilities, Accounts Payable |  |  |  |  | 65,718 |  |  |  |  |  |  |
Redeemable Noncontrolling Interest, Equity, Carrying Amount |  |  |  |  | 14,172 |  |  |  |  |  |  |
Payments for Deferred Acquisition | 1,500 |  | 1,500 |  |  |  |  |  |  |  |  |
Payments for Working Capital Payment |  |  | 4,000 |  | 2,426 |  |  |  |  |  |  |
Business Combination, Acquisition of Less than 100 Percent, Noncontrolling Interest, Fair Value | $ 42,631 |  | $ 42,631 |  | $ 6,706 |  |  |  |  |  |  |

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