Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net income (loss)	$ (31,111)	$ 76,452
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation	172,382	115,341
Stock-based compensation	34,061	30,613
Amortization of intangible assets	28,152	6,295
Amortization of debt issuance costs and debt discounts	5,508	3,774
Provision for allowance for doubtful accounts	1,885	1,865
Gains on asset sales	(5,242)	0
Other items	4,605	3,191
Changes in operating assets and liabilities:
Accounts receivable	(11,312)	(30,791)
Income taxes, net	(28,656)	(12,555)
Accounts payable and accrued expenses	(40,217)	29,693
Other assets and liabilities	(25,785)	8,933
Net cash provided by operating activities	104,270	232,811
Cash flows from investing activities:
Purchases of investments	(10,875)	(18,446)
Sales of investments	14,294	6,709
Maturities of investments	0	7,031
Business acquisitions, net of cash acquired	(1,601,627)	(10,247)
Purchases of real estate	(16,408)	(38,282)
Purchases of other property, plant and equipment	(197,700)	(150,120)
Proceeds from sale of assets	22,825	0
Changes in restricted cash	466,704	3,521
Net cash used in investing activities	(1,322,787)	(199,834)
Cash flows from financing activities:
Proceeds from employee equity awards	16,304	16,384
Payment of dividends	(124,836)	(96,619)
Proceeds from loans payable	701,250	0
Repayment of capital lease and other financing obligations	(33,232)	(5,296)
Repayment of mortgage and loans payable	(936,353)	(13,361)
Other financing activities	499	98
Net cash used in financing activities	(376,368)	(98,794)
Effect of foreign currency exchange rates on cash and cash equivalents	(195)	(8,391)
Net decrease in cash and cash equivalents	(1,595,080)	(74,208)
Cash and cash equivalents at beginning of period	2,228,838	610,917
Cash and cash equivalents at end of period	$ 633,758	$ 536,709