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Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Statement of Cash Flows [Abstract]
Net income (loss)	$ 11	$ (114,013)
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	66,820	61,058
Share-based compensation	19,476	9,463
Unrealized foreign exchange loss, net	3,916	16,311
Deferred income taxes	1,271	(1,427)
Goodwill impairment		104,554
Accretion of convertible debt discount and amortization of debt issuance costs	10,012	9,281
Changes in working capital, net of amounts acquired:
Income taxes payable, net	(785)	(16,433)
Trade accounts receivable	136,121	229,597
Prepaid expenses and other current assets	136,331	(16,999)
Trade accounts payable	(213,158)	(135,121)
Deferred revenue	(30)	26
Accrued expenses and other current liabilities	17,340	57,281
Changes in noncurrent assets and liabilities	(4,018)	(25,021)
Net cash (used in) provided by operating activities	173,307	178,557
Cash flows from investing activities:
Acquisitions, net of cash acquired		475
Purchases of property and equipment	(45,076)	(45,500)
Purchases of other long-term assets	(4,273)	(4,085)
Other, net	1,017	486
Net cash used in investing activities	(48,332)	(48,624)
Cash flows from financing activities:
Proceeds from issuance of shares	5,271	5,668
Repurchase of shares	(943)	(240,684)
Borrowings from revolving credit agreements	1,606,100	1,425,100
Repayments of revolving credit agreements	(1,855,700)	(1,425,100)
Net repayments from short-term debt obligations	(45)	(4,974)
Other, net	(3,236)	(984)
Net cash used in financing activities	(248,553)	(240,974)
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(43,278)	(27,787)
Decrease in cash and cash equivalents and restricted cash	(166,856)	(138,828)
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	1,932,652	1,678,551
Supplemental disclosure of cash flow information:
Interest paid during the period	13,688	13,359
Income taxes paid during the period	$ 18,886	$ 29,695

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