CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net loss	$ 11,466	$ (111,948)	$ 257,223
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Stock-based compensation	31,040	18,416	24,350
Depreciation	25,133	27,111	23,873
Amortization of intangibles	13,196	19,085	19,601
Amortization of deferred finance charges and debt discount	3,346	3,193	3,022
Goodwill and other asset impairment	7,819	80,057	4,415
Adjustment to deferred acquisition consideration	5,403	(374)	(4,819)
Deferred income taxes (benefits)	5,008	23,573	(173,019)
(Gain) loss on disposition of assets	3,237	(1,867)	(1,600)
Earnings of non-consolidated affiliates	(352)	(62)	(2,081)
Other non-current assets and liabilities	(863)	392	(4,420)
Foreign exchange	(9,475)	20,795	(17,637)
Changes in working capital:
Accounts receivable	(37,763)	30,211	(50,030)
Expenditures billable to clients	12,236	(11,223)	1,892
Prepaid expenses and other current assets	3,474	(17,189)	6,569
Accounts payable, accruals and other current liabilities	(14,077)	(18,222)	13,398
Acquisition related payments	(5,223)	(29,141)	(42,790)
Payments For (Proceeds From) Cash In Trust	0	(656)	(709)
Advance billings	32,934	(14,871)	14,548
Net cash provided by operating activities	86,539	17,280	71,786
Cash flows from investing activities:
Capital expenditures	(18,596)	(20,264)	(32,958)
Proceeds from sale of assets	23,050	2,082	10,631
Acquisitions, net of cash acquired	(4,823)	(32,713)	0
Payments of Distributions to Affiliates	0	963	3,672
Other investments	484	(499)	(2,229)
Net cash provided by (used in) investing activities	115	(50,431)	(20,884)
Cash flows from financing activities:
Acquisition related payments	(30,155)	(32,172)	(57,083)
Distributions to noncontrolling interests	(11,392)	(13,419)	(8,865)
Payment of dividends	(56)	(196)	(284)
Purchase of shares	(601)	(776)	(1,758)
Other	0	(146)	(404)
Net cash provided by (used in) financing activities	(11,729)	21,434	(32,599)
Effect of exchange rate changes on cash, cash equivalents, and cash held in trusts	1	77	(754)
Cash, Cash Equivalents, Restricted Cash, Restricted Cash Equivalents and Cash Held in Trusts Including Cash Classified Within Assets Held for Sale, Period Increase (Decrease)	74,926	(11,640)	17,549
Change in cash and cash equivalents classified within assets held for sale	4,441	0	0
Net increase (decrease) in cash, cash equivalents, and cash held in trusts including cash classified within assets held for sale	76,060	(19,938)	17,549
Cash and cash equivalents at beginning of period	30,873	50,811	33,262
Cash and cash equivalents at end of period	106,933	30,873	50,811
Supplemental disclosures:
Cash income taxes paid	2,296	3,836	8,099
Cash interest paid	62,223	64,012	62,895
Wells Fargo Capital Finance, LLC | Revolving Credit Facility
Cash flows from financing activities:
Repayment of revolving credit facility	(1,303,350)	(1,625,862)	(1,479,632)
Proceeds from revolving credit facility	1,235,205	1,694,005	1,425,207
Change in cash and cash equivalents held in trusts classified within held for sale	(3,307)	(8,298)	0
Series 4 Convertible Preferred Stock
Cash flows from financing activities:
Proceeds from issuance of common and convertible preference shares, net of issuance costs	$ 98,620	$ 0	$ 90,220