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CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Cash flows from operating activities:    
Net income $ 655,028 $ 962,330
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 538,534 505,852
Stock-based compensation expense 77,904 75,898
Deferred income taxes (35,637) 56,724
Equity investment income, net (417) (1,687)
Other non-cash charges, net 16,035 13,418
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures:    
Accounts receivable (135,632) (205,792)
Inventories 347 (2,490)
Other receivables and prepaid and other current assets 43,392 144,967
Other long-term assets (49,326) (19,663)
Accounts payable 38,870 (47,412)
Accrued compensation and benefits 35,491 (7,176)
Other current liabilities 87,248 (87,842)
Income taxes (37,770) 22,609
Other long-term liabilities (13,219) (8,748)
Net cash provided by operating activities 1,220,848 1,400,988
Cash flows from investing activities:    
Additions of property and equipment (409,391) (451,909)
Acquisitions (43,811) (45,143)
Proceeds from asset and business sales 116,088 46,578
Purchase of debt investments held-to-maturity (94,602) (13,274)
Purchase of other debt and equity investments (3,322) (2,609)
Proceeds from debt investments held-to-maturity 40,660 13,274
Proceeds from sale of other debt and equity investments 3,763 11,976
Other (782) (745)
Purchase of equity method investments (28,176) (7,925)
Distributions from equity method investments 2,490 1,592
Net cash used in investing activities (417,083) (448,185)
Cash flows from financing activities:    
Borrowings 1,705,913 1,613,036
Payments on long-term debt (1,557,358) (812,659)
Deferred financing and debt redemption costs 0 (9,091)
Purchase of treasury stock (802,228) (882,411)
Distributions to noncontrolling interests (188,592) (177,146)
Net payments related to stock purchases and awards (42,248) (59,849)
Contributions from noncontrolling interests 11,382 28,295
Proceeds from sales of additional noncontrolling interests 3,673 2,880
Purchases of noncontrolling interests (20,770) (11,658)
Net cash used in financing activities (890,228) (308,603)
Effect of exchange rate changes on cash, cash equivalents and restricted cash (6,283) (7,381)
Net (decrease) increase in cash, cash equivalents and restricted cash (92,746) 636,819
Cash, cash equivalents and restricted cash at beginning of the year 554,960 501,790
Cash, cash equivalents and restricted cash at end of the period $ 462,214 $ 1,138,609