CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 15,758	$ 113,348
Cash held in trust	5,667	6,419
Accounts receivable, less allowance for doubtful accounts of $1,207 and $1,409	418,725	355,295
Expenditures billable to clients	56,715	40,202
Other current assets	30,465	36,978
Total Current Assets	527,330	552,242
Fixed assets, at cost, less accumulated depreciation of $104,068 and $95,083	62,109	60,240
Investment in non-consolidated affiliates	10,805	6,110
Goodwill	869,869	851,373
Other intangible assets, net	74,833	86,121
Deferred tax asset	21,849	18,758
Other assets	50,406	74,046
Total Assets	1,617,201	1,648,890
Current Liabilities:
Accounts payable	293,491	316,285
Trust Liability, Current	5,667	6,419
Accruals and other liabilities	313,349	264,854
Advance billings	134,867	142,608
Current portion of long-term debt	508	534
Current portion of deferred acquisition consideration	105,986	90,804
Total Current Liabilities	853,868	821,504
Long-term debt, less current portion	826,678	742,593
Long-term portion of deferred acquisition consideration	185,741	114,564
Other liabilities	43,782	45,861
Deferred tax liabilities	83,869	77,997
Total Liabilities	1,993,938	1,802,519
Redeemable Noncontrolling Interests (Note 2)	$ 71,326	$ 194,951
Commitments, Contingencies and Guarantees (Note 11)
Shareholders’ Deficit:
Charges in excess of capital	$ (302,385)	$ (209,668)
Accumulated deficit	(500,768)	(489,633)
Total Shareholders' Deficit	(448,063)	(348,580)
Total Liabilities, Redeemable Noncontrolling Interests and Shareholders’ Deficit	1,617,201	1,648,890
Common Class A
Shareholders’ Deficit:
Class A Shares, no par value, unlimited authorized, 49,935,095 and 49,680,109 shares issued and outstanding in 2015 and 2014	269,557	265,817
Class B Shares, no par value, unlimited authorized, 3,755 shares issued and outstanding in 2015 and 2014, each convertible into one Class A share	269,557	265,817
Common Class B
Shareholders’ Deficit:
Class A Shares, no par value, unlimited authorized, 49,935,095 and 49,680,109 shares issued and outstanding in 2015 and 2014	1	1
Class B Shares, no par value, unlimited authorized, 3,755 shares issued and outstanding in 2015 and 2014, each convertible into one Class A share	1	1
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Shareholders’ Deficit:
Accumulated other comprehensive income (loss)	5,519	(7,752)
Total Shareholders' Deficit	5,519	(7,752)
Parent [Member]
Shareholders’ Deficit:
Stockholders' Equity Attributable to Parent	(528,076)	(441,235)
Total Shareholders' Deficit	(528,076)	(441,235)
Noncontrolling Interest [Member]
Shareholders’ Deficit:
Noncontrolling Interests	80,013	92,655
Total Shareholders' Deficit	$ 80,013	$ 92,655