Supplemental Cash Flow Information (Schedule Of Supplemental Consolidated Statements Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Supplemental Cash Flow Information [Line Items]
Income taxes (net of refunds of $4,339, $2,611 and $13,733 in 2011, 2010 and 2009, respectively)	$ 123,341	$ 34,808	$ 14,807
Interest (net of capitalization)	33,127	21,905	22,144
Decrease in inventory	(41,749)	(58,582)	180,132
Income taxes, refunds	4,339	2,611	13,733
Port De Bouc [Member]
Supplemental Cash Flow Information [Line Items]
Decrease in inventory			(3,689)
Decrease in other current assets			(7,878)
(Decrease) increase in current liabilities (principally accrued expenses)			$ (4,745)