CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 564,888	$ 524,922
Short-term investments	125,592	253,282
Assets held-for-sale	385,133	383,857
Accounts receivable, net	1,434,530	1,382,623
Inventory	245,495	251,133
Deferred income taxes	92,310	110,480
Other current assets	270,750	226,560
Total current assets	3,118,698	3,132,857
Long-term investments and other receivables	3,910	4,269
Property, plant and equipment, net	8,641,947	8,712,088
Goodwill	487,760	472,326
Investment in unconsolidated affiliates	64,598	61,690
Other long-term assets	268,544	272,792
Total assets	12,585,457	12,656,022
Current liabilities:
Current portion of long-term debt	435	364
Trade accounts payable	492,894	499,010
Accrued liabilities	533,218	599,380
Income taxes payable	64,599	33,628
Total current liabilities	1,091,146	1,132,382
Long-term debt	4,379,758	4,379,336
Other long-term liabilities	490,559	518,664
Deferred income taxes	570,121	599,335
Total liabilities	6,531,584	6,629,717
Commitments and contingencies (Note 9)
Subsidiary preferred stock (Note 8)	69,188	69,188
Shareholders' equity:
Common shares, par value $0.001 per share: Authorized common shares 800,000; issued 323,019 and 318,813, respectively	323	319
Capital in excess of par value	2,368,347	2,337,244
Accumulated other comprehensive income	343,143	431,595
Retained earnings	4,206,628	4,120,398
Less: treasury shares, at cost, 28,414 common shares	(944,627)	(944,627)
Total shareholders' equity	5,973,814	5,944,929
Noncontrolling interest	10,871	12,188
Total equity	5,984,685	5,957,117
Total liabilities and equity	$ 12,585,457	$ 12,656,022