CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 21,840	$ 61,458
Cash held in trust	5,330	5,122
Accounts receivable, less allowance for doubtful accounts of $1,465 and $1,306	392,639	361,044
Expenditures billable to clients	22,320	44,012
Other current assets	49,804	37,109
Total Current Assets	491,933	508,745
Fixed assets, at cost, less accumulated depreciation of $101,117 and $96,554	64,755	63,557
Investments in non-consolidated affiliates	6,632	6,263
Goodwill	877,167	870,301
Other intangible assets, net	67,493	72,382
Deferred tax asset	20,597	15,367
Other assets	42,978	41,010
Total Assets	1,571,555	1,577,625
Current Liabilities:
Accounts payable	313,183	359,568
Trust Liability, Current	5,330	5,122
Accruals and other liabilities	212,869	297,964
Advance billings	136,116	119,100
Current portion of long-term debt	415	470
Current portion of deferred acquisition consideration	98,061	130,400
Total Current Liabilities	765,974	912,624
Long-term debt, less current portion	896,694	728,413
Long-term portion of deferred acquisition consideration	222,912	216,704
Other liabilities	44,779	44,905
Deferred tax liabilities	95,405	92,581
Total Liabilities	2,025,764	1,995,227
Redeemable Noncontrolling Interests (Note 2)	$ 71,000	$ 69,471
Commitments, Contingencies and Guarantees (Note 11)
Shareholders’ Deficit:
Charges in excess of capital	$ (326,701)	$ (315,261)
Accumulated deficit	(550,283)	(526,990)
Total Shareholders' Deficit	(525,209)	(487,073)
Total Liabilities, Redeemable Noncontrolling Interests and Shareholders’ Deficit	1,571,555	1,577,625
Common Class A
Shareholders’ Deficit:
Class A Shares, no par value, unlimited authorized, 50,253,153 and 49,986,705 shares issued and outstanding in 2016 and 2015	275,263	269,841
Class B Shares, no par value, unlimited authorized, 3,755 shares issued and outstanding in 2016 and 2015, each convertible into one Class A share	275,263	269,841
Common Class B
Shareholders’ Deficit:
Class A Shares, no par value, unlimited authorized, 50,253,153 and 49,986,705 shares issued and outstanding in 2016 and 2015	1	1
Class B Shares, no par value, unlimited authorized, 3,755 shares issued and outstanding in 2016 and 2015, each convertible into one Class A share	1	1
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Shareholders’ Deficit:
Accumulated other comprehensive income (loss)	(4,224)	6,257
Total Shareholders' Deficit	(4,224)	6,257
Parent [Member]
Shareholders’ Deficit:
Stockholders' Equity Attributable to Parent	(605,944)	(566,152)
Total Shareholders' Deficit	(605,944)	(566,152)
Noncontrolling Interest [Member]
Shareholders’ Deficit:
Noncontrolling Interests	80,735	79,079
Total Shareholders' Deficit	$ 80,735	$ 79,079