Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net income	$ 118,957	$ 117,747
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	287,378	263,643
Stock-based compensation	64,499	49,023
Amortization of intangible assets	48,491	49,535
Amortization of debt issuance costs and debt discounts and premiums	3,460	2,995
Provision for allowance for doubtful accounts	3,934	4,594
Impairment charges	0	14,448
Loss on asset sales	1,199	0
Loss on debt extinguishment	6,441	382
Other items	4,484	5,157
Changes in operating assets and liabilities:
Accounts receivable	15,306	(84,350)
Income taxes, net	3,697	15,825
Other assets	(101,882)	(7,833)
Operating lease right-of-use assets	38,797	41,264
Operating lease liabilities	(35,193)	(38,886)
Accounts payable and accrued expenses	(25,681)	(11,463)
Other liabilities	82,943	(940)
Net cash provided by operating activities	516,830	421,141
Cash flows from investing activities:
Purchases of investments	(44,813)	(9,297)
Sales of investments	5,873	518
Business acquisitions, net of cash and restricted cash acquired	(478,287)	0
Purchases of real estate	(36,373)	(5,721)
Purchases of other property, plant and equipment	(400,941)	(363,967)
Net cash used in investing activities	(954,541)	(378,467)
Cash flows from financing activities:
Proceeds from employee equity awards	30,391	27,593
Payment of dividends and special distribution	(233,479)	(204,603)
Proceeds from public offering of common stock, net of issuance costs	101,792	1,213,434
Proceeds from revolving credit facility	250,000	0
Repayments of finance lease liabilities	(18,977)	(31,158)
Repayments of mortgage and loans payable	(18,501)	(18,334)
Repayment of senior notes	(343,711)	0
Debt extinguishment costs	(4,619)	0
Net cash provided by (used in) financing activities	(237,104)	986,932
Effect of foreign currency exchange rates on cash, cash equivalents and restricted cash	(25,287)	(1,695)
Net increase (decrease) in cash, cash equivalents and restricted cash	(700,102)	1,027,911
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	1,186,511	1,655,515
Total cash, cash equivalents, and restricted cash shown in the condensed consolidated statement of cash flows	$ 1,186,511	$ 1,655,515