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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Statement of Cash Flows [Abstract]
Net income (loss)	$ 73,725	$ (73,698)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	100,729	93,470
Share-based compensation	26,281	14,500
Unrealized foreign exchange loss, net	12,051	17,679
Deferred income taxes	1,412	(5,011)
Goodwill and acquired intangible assets impairment		106,021
Accretion of convertible debt discount and amortization of debt issuance costs	15,099	13,996
Changes in working capital, net of amounts acquired:
Income taxes payable, net	17,464	(26,625)
Trade accounts receivable	96,541	232,380
Prepaid expenses and other current assets	119,698	(25,917)
Trade accounts payable	(209,069)	(127,291)
Deferred revenue	(2,782)	(4,540)
Accrued expenses and other current liabilities	47,254	25,110
Changes in noncurrent assets and liabilities	5,937	(19,658)
Net cash provided by operating activities	304,340	220,416
Cash flows from investing activities:
Acquisitions, net of cash acquired		(451)
Purchases of property and equipment	(66,058)	(71,396)
Purchases of other long-term assets	(6,171)	(5,968)
Other, net	1,277	742
Net cash used in investing activities	(70,952)	(77,073)
Cash flows from financing activities:
Proceeds from issuance of shares	6,443	6,564
Repurchase of shares	(979)	(240,838)
Borrowings from revolving credit agreements	3,539,100	2,018,600
Repayments of revolving credit agreements	(3,756,300)	(2,018,600)
Net borrowing (repayments) from short-term debt obligations	199	(5,032)
Other, net	(4,754)	(4,763)
Net cash used in financing activities	(216,291)	(244,069)
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(82,667)	32,042
Decrease in cash and cash equivalents and restricted cash	(65,570)	(68,684)
Cash and cash equivalents and restricted cash at beginning of period	2,099,508	1,817,379
Cash and cash equivalents and restricted cash at end of period	2,033,938	1,748,695
Supplemental disclosure of cash flow information:
Interest paid during the period	17,226	16,653
Income taxes paid during the period	$ 28,752	$ 50,300

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