CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 17,497	$ 102,007
Accounts receivable, less allowance for doubtful accounts of $1,852 and $2,011	365,475	309,796
Expenditures billable to clients	69,423	63,246
Other current assets	34,535	25,458
Total Current Assets	486,930	500,507
Fixed assets, at cost, less accumulated depreciation of $117,903 and $118,119	50,540	52,071
Investment in non-consolidated affiliates	320	275
Goodwill	873,855	744,333
Other intangibles assets, net	72,800	56,262
Deferred tax asset	22,613	21,131
Other assets	63,214	50,648
Total Assets	1,570,272	1,425,227
Current Liabilities:
Accounts payable	214,568	246,694
Accruals and other liabilities	256,718	240,580
Advance billings	180,050	149,540
Current portion of long-term debt	424	467
Current portion of deferred acquisition consideration	53,885	53,041
Total Current Liabilities	705,645	690,322
Long-term debt	696,800	664,661
Long-term portion of deferred acquisition consideration	164,893	100,872
Other liabilities	33,068	34,430
Deferred tax liabilities	63,925	63,020
Total Liabilities	1,664,331	1,553,305
Redeemable Noncontrolling Interests (Note 2)	155,980	148,534
Commitments, contingencies and guarantees (Note 11)
Shareholders' Deficit:
Preferred shares, unlimited authorized, none issued
Shares to be issued, 42,000 shares	424	424
Charges in excess of capital	(151,661)	(126,352)
Accumulated deficit	(474,422)	(465,576)
Stock subscription receivable	(55)	(55)
Accumulated other comprehensive income (loss)	1,197	(797)
MDC Partners Inc. Shareholders’ Deficit	(360,441)	(329,700)
Total Shareholders’ Deficit	(250,039)	(276,612)
Noncontrolling Interests	110,402	53,088
Total Liabilities, Redeemable Noncontrolling Interests and Shareholders’ Deficit	1,570,272	1,425,227
Common Class A [Member]
Shareholders' Deficit:
Common Stock	264,075	262,655
Common Class B [Member]
Shareholders' Deficit:
Common Stock	$ 1	$ 1