Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities:
Net income (loss)	$ (696,029)	$ 211,588
Income (loss) from discontinued operations, net of tax	(778,647)	87,475
Income from continuing operations	82,618	124,113
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	164,969	151,342
Deferred income taxes	12,636	17,658
Excess tax benefit on stock-based compensation	0	(4,729)
Changes in current assets and liabilities:
Receivables	(88,420)	(64,369)
Inventories	(13,919)	(22,108)
Other current assets	28,780	(26,007)
Accounts payable	61,968	(11,504)
Other current liabilities	6,820	(75)
Other noncurrent changes	4,463	(24,234)
Net cash provided by continuing operations	259,915	140,087
Net cash provided by discontinued operations	122,279	279,187
Net cash provided by operating activities	382,194	419,274
Investing activities:
Capital expenditures	(484,483)	(367,182)
Net proceeds from sale or disposition of property and other	37,679	12,281
Investments	1,309	(916)
Net cash used in continuing operations	(445,495)	(355,817)
Net cash used in discontinued operations	(98,521)	(287,681)
Net cash used in investing activities	(544,016)	(643,498)
Financing activities:
Issuance of short-term borrowings	29,500	0
Repayment of short-term borrowings	0	(11,500)
Issuance of long-term debt	327,470	672,351
Repayment of long-term debt	(146,333)	(318,579)
Proceeds from issuance of common stock	21,894	144,868
Dividends paid	(107,028)	(102,105)
Excess tax benefit on stock-based compensation	0	4,729
Tax withholding on stock-based compensation	0	(5,564)
Distribution to noncontrolling interest	52,000	44,900
Distribution to noncontrolling interest	(8,443)	0
Net cash provided by continuing operations	169,060	429,100
Net cash used in discontinued operations	(271)	(412)
Net cash provided by financing activities	168,789	428,688
Effect of exchange rate changes on cash and cash equivalents	(192)	(53)
Increase in cash and cash equivalents	6,775	204,411
Cash and cash equivalents - beginning of year	81,855	57,340
Cash and cash equivalents - end of period	$ 88,630	$ 261,751