CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 251,366	$ 501,149
Short-term investments	25,196	35,020
Assets held for sale	78,400	146,467
Accounts receivable, net	871,385	1,517,503
Inventory	177,221	230,067
Deferred income taxes	39,981	118,230
Other current assets	275,526	193,438
Total current assets	1,719,075	2,741,874
Long-term investments and other receivables	2,455	2,806
Property, plant and equipment, net	7,287,531	8,599,125
Goodwill	150,032	173,928
Investment in unconsolidated affiliates	460,543	58,251
Other long-term assets	309,545	303,958
Total assets	9,929,181	11,879,942
Current liabilities:
Current portion of debt	8,982	6,190
Trade accounts payable	302,415	780,060
Accrued liabilities	730,809	728,004
Income taxes payable	7,345	53,221
Total current liabilities	1,049,551	1,567,475
Long-term debt	3,737,773	4,348,859
Other long-term liabilities	630,458	601,816
Deferred income taxes		443,003
Total liabilities	$ 5,417,782	$ 6,961,153
Commitments and contingencies (Note 11)
Shareholders' equity:
Common shares, par value $0.001 per share: Authorized common shares 800,000; issued 330,595 and 328,196, respectively	$ 331	$ 328
Capital in excess of par value	2,484,946	2,452,261
Accumulated other comprehensive income (loss)	(21,563)	77,522
Retained earnings	3,311,662	3,573,172
Less: treasury shares, at cost, 47,070 and 38,788 common shares, respectively	(1,273,063)	(1,194,664)
Total shareholders' equity	4,502,313	4,908,619
Noncontrolling interest	9,086	10,170
Total equity	4,511,399	4,918,789
Total liabilities and equity	$ 9,929,181	$ 11,879,942