Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Cash Flow Information [Abstract]

Net Changes In Components Of Operating Assets And Liabilities

	Year Ended December 31,
	2011			2010			2009
(Increase) decrease in:
Accounts receivable	$	(66,208	)	$	(41,648	)	$	(7,979	)
Inventories		(46,151	)		(16,870	)		(16,559	)
Other current assets		(3,598	)		(4,036	)		(2,712	)
Increase (decrease) in:
Accounts payable		33,049			47,401			19,203
Accrued liabilities		15,977			9,666			(1,522	)
Net changes in components of operating assets and liabilities	$	(66,931	)	$	(5,487	)	$	(9,569	)