CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income	$ 170,668	$ 205,718
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	178,071	172,944
Stock-based compensation expense	25,373	24,904
Deferred income taxes	(3,621)	(41)
Equity investment loss, net	3,044	664
Other non-cash charges, net	5,864	4,714
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures:
Accounts receivable	81,850	(66,270)
Inventories	2,758	849
Other receivables and prepaid and other current assets	66,595	(17,966)
Other long-term assets	(615)	3,520
Accounts payable	(20,535)	21,402
Accrued compensation and benefits	(74,144)	(95,927)
Other current liabilities	(6,486)	26,912
Income taxes	39,251	52,473
Other long-term liabilities	(5,516)	(11,701)
Net cash provided by operating activities	462,557	322,195
Cash flows from investing activities:
Additions of property and equipment	(147,705)	(123,108)
Acquisitions	0	(5,166)
Proceeds from asset and business sales	13,474	11,353
Purchase of debt investments held-to-maturity	(25,000)	(5,070)
Purchase of other debt and equity investments	(4,643)	(2,726)
Proceeds from debt investments held-to-maturity	50,258	5,070
Proceeds from sale of other debt and equity investments	3,856	3,773
Purchase of equity method investments	(7,904)	(2,962)
Distributions from equity method investments	1,120	470
Net cash used in investing activities	(116,544)	(118,366)
Cash flows from financing activities:
Borrowings	611,829	354,285
Payments on long-term debt	(880,552)	(398,990)
Deferred financing and debt redemption costs	(7)	0
Purchase of treasury stock	0	(236,232)
Distributions to noncontrolling interests	(54,837)	(65,452)
Net payments related to stock purchases and awards	(7,902)	(501)
Contributions from noncontrolling interests	4,725	4,929
Proceeds from sales of additional noncontrolling interests	50,832	3,673
Purchases of noncontrolling interests	0	(3,283)
Net cash used in financing activities	(275,912)	(341,571)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	2,307	3,363
Net increase (decrease) in cash, cash equivalents and restricted cash	72,408	(134,379)
Cash, cash equivalents and restricted cash at beginning of the year	338,989	554,960
Cash, cash equivalents and restricted cash at end of the period	$ 411,397	$ 420,581