CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 34,851	$ 113,348
Cash held in trust	206,098	6,419
Accounts receivable, less allowance for doubtful accounts of $1,246 and $1,409	413,964	355,295
Expenditures billable to clients	46,548	40,202
Other current assets	40,952	36,978
Total Current Assets	742,413	552,242
Fixed assets, at cost, less accumulated depreciation of $102,027 and $95,083	59,206	60,240
Investment in non-consolidated affiliates	10,027	6,110
Goodwill	878,366	851,373
Other intangibles assets, net	83,494	86,121
Deferred tax asset	19,893	18,758
Other assets	55,248	74,046
Total Assets	1,848,647	1,648,890
Current Liabilities:
Accounts payable	303,152	316,285
Trust Liability, Current	206,098	6,419
Accruals and other liabilities	364,331	264,854
Advance billings	156,658	142,608
Current portion of long-term debt	515	534
Current portion of deferred acquisition consideration	106,334	90,804
Total Current Liabilities	1,137,088	821,504
Long-term debt, less current portion	741,780	742,593
Long-term portion of deferred acquisition consideration	114,533	114,564
Other liabilities	45,627	45,861
Deferred tax liabilities	83,402	77,997
Total Liabilities	2,122,430	1,802,519
Redeemable Noncontrolling Interests (Note 2)	$ 148,401	$ 194,951
Commitments, contingencies and guarantees (Note 11)
Shareholders’ Deficit:
Charges in excess of capital	$ (278,484)	$ (209,668)
Accumulated deficit	(492,164)	(489,633)
Total Shareholders' Deficit	(422,184)	(348,580)
Total Liabilities, Redeemable Noncontrolling Interests and Shareholders’ Deficit	1,848,647	1,648,890
Common Class A
Shareholders’ Deficit:
Class A Shares, no par value, unlimited authorized, 49,864,772 and 49,680,109 shares issued and outstanding in 2015 and 2014	268,849	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	268,849	265,817
Common Class B
Shareholders’ Deficit:
Class A Shares, no par value, unlimited authorized, 49,864,772 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 loss	(2,152)	(7,752)
Total Shareholders' Deficit	(2,152)	(7,752)
Parent [Member]
Shareholders’ Deficit:
Stockholders' Equity Attributable to Parent	(503,950)	(441,235)
Total Shareholders' Deficit	(503,950)	(441,235)
Noncontrolling Interest [Member]
Shareholders’ Deficit:
Noncontrolling Interests	81,766	92,655
Total Shareholders' Deficit	$ 81,766	$ 92,655