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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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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 | )

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