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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:      
Net income $ 505,304 $ 153,185 $ 332,964
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization expense 569,513 314,987 66,126
Impairment of long lived assets 28,767 20,037 5,411
Reduction in carrying value of operating right-of-use assets 45,215 45,339 28,480
Loss on equity method investments 3,136 2,161 366
Amortization of financing costs and debt discount 17,749 12,890 523
Stock compensation expense 70,523 133,844 26,271
Loss on extinguishment of debt 0 14,434 0
Loss on issuance of debt 0 59,460 0
Deferred tax (benefit)/expense (124,985) (60,616) 927
Unrealized foreign exchange (gain)/loss (13,009) (6,054) 5,979
Other non-cash items 11,324 4,480 (7,859)
Changes in operating assets and liabilities:      
Accounts receivable (420,695) 113,513 (175,040)
Unbilled revenue (332,592) (17,656) (5,748)
Unearned revenue 192,944 (69,121) 291,844
Other net assets 10,121 108,259 (2,209)
Net cash provided by operating activities 563,315 829,142 568,035
Cash flows from investing activities:      
Purchase of property, plant and equipment (142,160) (93,750) (40,885)
Purchase of subsidiary undertakings (net of cash acquired) 0 (5,914,475) (47,931)
Investment in equity method investments 0 (2,450) (2,450)
Loan to equity method investment 0 (10,000) 0
Sale of available for sale investments 481 497 47,902
Purchase of available for sale investments (482) (480) 0
Proceeds from investments in equity - long term 1,906 500 87
Purchase of investments in equity - long term (5,612) (4,077) (3,299)
Net cash used in investing activities (145,867) (6,024,235) (46,576)
Cash flows from financing activities:      
Financing costs 0 (30,328) (1,554)
Drawdown of credit lines and facilities 75,000 5,905,100 350,000
Repayment of credit lines and facilities (875,000) (877,780) (350,000)
Purchase of noncontrolling interest 0 0 (43,923)
Proceeds from the exercise of equity compensation 35,844 118,589 13,203
Share issue costs (17) (853) (14)
Repurchase of ordinary shares (99,983) 0 (175,000)
Share repurchase costs (17) 0 (140)
Settlement of cash flow hedge 0 0 (905)
Net cash (used in)/provided by financing activities (864,173) 5,114,728 (208,333)
Effect of exchange rate movements on cash (16,720) (7,727) 6,870
Net (decrease)/increase in cash and cash equivalents (463,445) (88,092) 319,996
Cash and cash equivalents at beginning of year 752,213 840,305 520,309
Cash and cash equivalents at end of year $ 288,768 $ 752,213 $ 840,305