CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net loss	$ (128,949)	$ (76,188)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization (including impairments)	642,705	608,724
Equity in net loss of affiliates	10,442	2,757
Loss (gain) on investments and sale of affiliate interests, net	248,602	(131,658)
Loss (gain) on derivative contracts, net	(168,352)	71,044
Loss on extinguishment of debt and write-off of deferred financing costs	4,705	0
Amortization of deferred financing costs and discounts (premiums) on indebtedness	16,950	1,812
Settlement loss related to pension plan	606	0
Share-based compensation expense	21,623	7,848
Deferred income taxes	(65,833)	(52,184)
Provision for doubtful accounts	13,500	15,694
Change in assets and liabilities, net of effects of acquisitions and dispositions:
Accounts receivable, trade	25,207	34,707
Other receivables	(28,759)	0
Prepaid expenses and other assets	9,609	(10,113)
Amounts due from and due to affiliates	(1,465)	(131,564)
Accounts payable	11,297	147,999
Accrued liabilities	(224,787)	(253,707)
Deferred revenue	11,929	11,257
Liabilities related to interest rate swap contracts	31,922	(2,342)
Net cash provided by operating activities	430,952	244,086
Cash flows from investing activities:
Payment for acquisition, net of cash acquired	(28,940)	(43,608)
Sale of affiliate interests	(3,537)	0
Capital expenditures	(257,615)	(257,427)
Proceeds related to sale of equipment, including costs of disposal	965	596
Increase in other investments	(2,500)	(550)
Additions to other intangible assets	0	(183)
Net cash used in investing activities	(291,627)	(301,172)
Cash flows from financing activities:
Proceeds from credit facility debt, net of discounts	1,642,500	225,000
Repayment of credit facility debt	(610,663)	(183,288)
Issuance of senior notes and debentures	1,000,000	0
Proceeds from collateralized indebtedness	0	156,136
Repayment of collateralized indebtedness and related derivative contracts	0	(150,084)
Redemption of senior notes, including premiums and fees	(1,057,019)	0
Proceeds from notes payable	6,812	0
Principal payments on capital lease obligations	(3,067)	(4,207)
Additions to deferred financing costs	(19,225)	(1,290)
Other	(859)	0
Net cash provided by financing activities	958,479	42,267
Net increase (decrease) in cash and cash equivalents	1,097,804	(14,819)
Cash, cash equivalents and restricted cash at beginning of year	330,100	503,093
Cash, cash equivalents and restricted cash at end of period	$ 1,427,904	$ 488,274