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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Cash Flows [Abstract]      
Net income (loss) $ 70,587 $ (3,304) $ 346,695
Adjustments to reconcile net income (loss) to net cash provided by operating activities:      
Depreciation and amortization 135,754 127,021 111,744
Share-based compensation 36,540 21,951 21,439
Unrealized foreign exchange loss (gain), net 10,866 3,756 (2,701)
Non-cash impairment of goodwill and acquired intangible assets 106,602
Deferred income taxes (2,255) (23,946) 17,113
Loss on early retirement of debt 9,831
Accretion of convertible debt discount and amortization of debt issuance costs 20,239 18,924 17,088
Changes in working capital, net of amounts acquired:      
Income taxes payable, net 23,912 (16,823) 13,177
Trade accounts receivable (107,478) 63,629 (87,882)
Prepaid expenses and other current assets 93,475 (168,256) (68,945)
Trade accounts payable (33,218) 88,687 53,550
Deferred revenue 7,472 10,945 132
Accrued expenses and other current liabilities 93,040 118,618 98,459
Changes in non-current assets and liabilities 57,642 (94,299) (25,212)
Net cash provided by operating activities 406,576 253,505 504,488
Cash flows from investing activities:      
Acquisitions, net of cash acquired (1,100) (94,187)
Purchases of property and equipment (92,207) (97,628) (131,287)
Purchases of other long-term assets (7,752) (7,770) (7,274)
Other, net 1,850 967 3,721
Net cash used in investing activities (98,109) (105,531) (229,027)
Cash flows from financing activities:      
Proceeds from issuance of shares 10,848 18,101 14,979
Repurchase of shares (229,877) (241,518) (74,456)
Borrowings from revolving credit agreements 5,074,000 3,113,800 2,498,298
Repayments of revolving credit agreements (5,061,000) (2,843,400) (2,714,203)
Repayments of long-term debt obligations (446,702)
Net borrowings (repayments) from short-term debt obligations 52 (5,157) (32,091)
Proceeds from long-term debt obligations 1,194,900
Debt issuance costs (17,947)
Other, net (6,259) (6,428) (6,480)
Net cash (used in) provided by financing activities (212,236) 35,398 416,298
Effect of exchange rate changes on cash and cash equivalents and restricted cash (109,637) 98,757 (5,332)
(Decrease) increase in cash and cash equivalents and restricted cash (13,406) 282,129 686,427
Cash and cash equivalents and restricted cash at beginning of period 2,099,508 1,817,379 1,130,952
Cash and cash equivalents and restricted cash at end of period 2,086,102 2,099,508 1,817,379
Supplemental Cash Flow Disclosures:      
Interest paid during the period 18,503 17,319 13,125
Income taxes paid during the period $ 48,688 $ 60,170 $ 74,086