Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net income	$ 319,138	$ 382,410
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	897,075	806,704
Stock-based compensation	215,591	174,413
Amortization of intangible assets	148,075	147,589
Amortization of debt issuance costs and debt discounts and premiums	11,788	9,429
Provision for allowance for doubtful accounts	6,466	8,588
Impairment charges	7,306	16,023
Gain on asset sales	(928)	(463)
Loss on debt extinguishment	101,803	67
Other items	14,764	9,909
Changes in operating assets and liabilities:
Accounts receivable	(38,104)	(123,389)
Income taxes, net	(20,193)	73,144
Other assets	(127,535)	(62,036)
Operating lease right-of-use assets	114,611	108,226
Operating lease liabilities	(107,391)	(112,059)
Accounts payable and accrued expenses	35,846	6,660
Other liabilities	45,366	17,843
Net cash provided by operating activities	1,623,678	1,463,058
Cash flows from investing activities:
Purchases of investments	(55,993)	(23,692)
Sales of investments	19,681	8,945
Business acquisitions, net of cash and restricted cash acquired	(478,248)	(34,143)
Purchases of real estate	(124,462)	(64,288)
Purchases of other property, plant and equipment	(1,448,174)	(1,364,960)
Proceeds from sale of assets, net of cash transferred	0	117
Net cash used in investing activities	(2,087,196)	(1,478,021)
Cash flows from financing activities:
Proceeds from employee equity awards	62,118	52,018
Payment of dividends and special distribution	(710,177)	(625,804)
Proceeds from public offering of common stock, net of issuance costs	1,981,375	1,660,976
Proceeds from senior notes, net of debt discounts	2,585,736	0
Proceeds from mortgage and loans payable	750,790	0
Repayments of finance lease liabilities	(74,446)	(62,785)
Repayments of mortgage and loans payable	(808,609)	(53,796)
Repayment of senior notes	(2,440,761)	(150,000)
Debt extinguishment costs	(82,404)	0
Debt issuance costs	(26,266)	0
Net cash provided by financing activities	1,237,356	820,609
Effect of foreign currency exchange rates on cash, cash equivalents and restricted cash	5,637	(13,117)
Net increase in cash, cash equivalents and restricted cash	779,475	792,529
Cash, cash equivalents and restricted cash at beginning of period	1,886,613	627,604
Cash, cash equivalents and restricted cash at end of period	2,666,088	1,420,133
Total cash, cash equivalents, and restricted cash shown in the condensed consolidated statement of cash flows	$ 2,666,088	$ 1,420,133