UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net loss	$ (36,235)	$ 25,768
Adjustments to reconcile net income (loss) to cash used in operating activities:
Stock-based compensation	16,882	16,870
Depreciation	20,944	18,000
Amortization of intangibles	14,268	14,916
Amortization of deferred finance charges	2,402	2,018
Goodwill and other asset impairment	23,325	0
Adjustment to deferred acquisition consideration	8,522	13,354
Acquisition-related contingent consideration payment	(28,263)	(36,570)
Deferred income taxes (benefits)	(6,690)	8,125
Gain (loss) on sale of assets	(1,408)	1,245
(Earnings) losses of non-consolidated affiliates	(358)	(1,924)
Other non-current assets and liabilities	(956)	(4,388)
Foreign exchange	9,125	(15,113)
Changes in working capital:
Accounts receivable	8,574	(54,723)
Expenditures billable to clients	(28,171)	(9,294)
Prepaid expenses and other current assets	(11,516)	6,400
Accounts payable, accruals and other liabilities	(49,587)	(31,149)
Advance billings	27,413	32,015
Net cash used in operating activities	(31,729)	(14,450)
Cash flows used in investing activities:
Capital expenditures	(15,232)	(28,305)
Deposits	0	(1,461)
Other investments	1,180	(1,530)
Net cash used in investing activities	(48,355)	(19,503)
Cash flows provided by financing activities:
Payment for Contingent Consideration Liability, Financing Activities	32,240	52,556
Repayment of long-term debt	(260)	(310)
Purchase of shares	(776)	(1,239)
Distributions to noncontrolling interests	(10,410)	(5,272)
Payment of dividends	(182)	(284)
Net cash provided by financing activities	59,122	24,887
Effect of exchange rate changes on cash and cash equivalents	(161)	6
Decrease in cash and cash equivalents	(21,123)	(9,060)
Cash and cash equivalents at beginning of period	46,179	27,921
Cash and cash equivalents at end of period	25,056	18,861
Supplemental disclosures:
Cash income taxes paid	4,822	6,909
Cash interest paid	33,011	32,324
Change in cash held in trusts	(667)	(159)
Non-cash transactions:
Capital leases	600	621
Dividends payable	271	453
Payments to Acquire Businesses, Net of Cash Acquired	34,303	0
Proceeds from Sale of Other Assets, Investing Activities	0	11,120
Payments of Distributions to Affiliates	0	673
Wells Fargo Capital Finance, LLC | Revolving Credit Facility
Cash flows provided by financing activities:
Repayments of revolving credit agreement	(1,121,300)	(1,093,508)
Proceeds from revolving credit agreement	1,224,290	1,087,688
Series 4 Convertible Preferred Stock
Cash flows provided by financing activities:
Proceeds from issuance of convertible preference shares	0	95,000
Convertible Preferred Stock
Cash flows provided by financing activities:
Convertible preference shares issuance costs	0	(4,632)
Common Class A [Member] | Common Stock
Non-cash transactions:
Stock Issued During Period, Value, Acquisitions	$ 7,030	$ 28,727