CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
OPERATING ACTIVITIES
Net income	$ 324,597	$ 497,033
Adjustments to reconcile net earnings to net cash provided from operating activities:
Depreciation, amortization and depletion	110,453	90,572
Equity earnings of affiliate, net of dividends received	(3,414)	(8,163)
Loss (gain) on currency translation effect	(5,688)	13,894
(Benefit) for deferred income taxes	(84,320)	(5,745)
Cash provided from (used for) operating assets and liabilities:
Accounts receivable	(10,074)	79,664
Inventories	(102,061)	(31,115)
Accounts payable and accrued liabilities	69,313	64,510
Other operating assets and liabilities	35,954	(106,178)
Net cash provided from operating activities	334,760	594,472
INVESTING ACTIVITIES
Capital expenditures	(323,726)	(316,798)
Purchase of short-term investments, net	(64,742)	(70,190)
Loan repaid by related party		10,573
Sale of property	294	224
Net cash used for investing activities	(388,174)	(376,191)
FINANCING ACTIVITIES
Cash dividends paid to common stockholders	(100,026)	(202,932)
Repurchase of common shares	(52,479)
Distributions to non-controlling interest	(302)	(472)
Other	273	258
Net cash used for financing activities	(152,534)	(203,146)
Effect of exchange rate changes on cash and cash equivalents	6,354	(12,273)
(Decrease) increase in cash and cash equivalents	(199,594)	2,862
Cash and cash equivalents, at beginning of period	1,672,695	2,459,488
Cash and cash equivalents, at end of period	$ 1,473,101	$ 2,462,350