CONSOLIDATED BALANCE SHEETS (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Current Assets:    
Cash and cash equivalents $ 102,007 $ 60,330
Accounts receivable, less allowance for doubtful accounts of $2,011 and $1,581 309,796 326,087
Expenditures billable to clients 63,246 58,842
Other current assets 25,458 16,892
Total Current Assets 500,507 462,151
Fixed assets, net 52,071 52,914
Investment in affiliates 275 0
Goodwill 744,333 720,071
Other intangible assets, net 56,262 63,243
Deferred tax assets 21,131 9,332
Other assets 50,648 37,234
Total Assets 1,425,227 1,344,945
Current Liabilities:    
Accounts payable 246,694 234,324
Accrued and other liabilities 240,580 216,418
Advance billings, net 149,540 131,908
Current portion of long-term debt 467 1,858
Deferred acquisition consideration 53,041 104,325
Total Current Liabilities 690,322 688,833
Long-term debt 664,661 429,845
Long-term portion of deferred acquisition consideration 100,872 92,121
Other liabilities 34,430 47,985
Deferred tax liabilities 63,020 53,018
Total Liabilities 1,553,305 1,311,802
Redeemable Noncontrolling Interests 148,534 117,953
Commitments, Contingencies and Guarantees (Note 17)      
Shareholders' Deficit:    
Preferred shares, unlimited authorized, none issued 0 0
Shares to be issued, 42,000 shares, issued and outstanding in 2013 and 2012 424 424
Additional paid-in capital 0 0
Charges in excess of capital (126,352) (72,913)
Accumulated deficit (465,576) (316,713)
Stock subscription receivable (55) (55)
Accumulated other comprehensive loss (797) (7,445)
MDC Partners Inc. Shareholders' Deficit (329,700) (142,832)
Noncontrolling Interests 53,088 58,022
Total Shareholders' Deficit (276,612) (84,810)
Total Liabilities, Redeemable Noncontrolling Interests and Shareholders' Deficit 1,425,227 1,344,945
Common Class A [Member]
    
Shareholders' Deficit:    
Common Stock 262,655 253,869
Common Class B [Member]
    
Shareholders' Deficit:    
Common Stock $ 1 $ 1