Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 65,050	$ 177,043
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	534,026	362,069
Stock-based compensation	115,730	98,575
Amortization of intangible assets	93,384	19,346
Amortization of debt issuance costs and debt discounts	13,709	11,557
Provision for allowance for doubtful accounts	6,541	4,187
Gains on asset sales	(33,187)	0
Gains on sale of discontinued operations	4,242	0
Impairment charges	7,698	0
Loss on debt extinguishment	(10,499)	0
Other items	13,378	11,162
Changes in operating assets and liabilities:
Accounts receivable	(72,807)	(42,002)
Income taxes, net	1,021	(84,523)
Accounts payable and accrued expenses	(11,526)	75,219
Other assets and liabilities	(22,004)	27,042
Net cash provided by operating activities	717,270	659,675
Cash flows from investing activities:
Purchases of investments	(31,736)	(338,440)
Sales of investments	41,796	826,486
Maturities of investments	0	35,431
Business acquisitions, net of cash acquired	(1,767,528)	(10,247)
Purchases of real estate	(28,118)	(38,282)
Purchases of other property, plant and equipment	(727,044)	(587,508)
Proceeds from sale of assets, net of cash transferred	828,197	0
Changes in restricted cash	444,736	(493,371)
Net cash used in investing activities	(1,239,697)	(605,931)
Cash flows from financing activities:
Proceeds from employee equity awards	34,143	29,855
Payment of dividends	(374,151)	(291,009)
Proceeds from loans payable	710,404	490,000
Repayment of capital lease and other financing obligations	(100,863)	(20,213)
Repayment of mortgage and loans payable	(986,465)	(529,447)
Debt extinguishment costs	(10,181)	0
Debt issuance costs	11,751	617
Excess tax benefits from stock-based compensation	1,465	1,663
Net cash used in financing activities	(737,399)	(319,768)
Effect of foreign currency exchange rates on cash and cash equivalents	22,658	(9,424)
Change in cash balances included in assets held for sale	(3,755)	0
Net decrease in cash and cash equivalents	(1,240,923)	(275,448)
Cash and cash equivalents at beginning of period	2,228,838	610,917
Cash and cash equivalents at end of period	$ 987,915	$ 335,469