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Supplemental Cash Flow Information (Tables) | 9 Months Ended
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Sep. 30, 2013
Supplemental Cash Flow Elements [Abstract] |
Net Changes In Components Of Operating Assets And Liabilities | The following table provides information regarding the net changes in components of operating assets and liabilities.
| Nine Months Ended September 30,
| 2013 |  | 2012
(Increase) decrease in: |  |  |
Accounts receivable | $ | (92,906 | ) |  | $ | (80,789 | )
Inventories | (32,073 | ) |  | 33,826 |
Other current assets | 13,897 |  |  | 1,846 |
Increase (decrease) in: |  |  |
Accounts payable | 75,506 |  |  | 57,851 |
Accrued liabilities | 7,222 |  |  | 6,144 |
Net changes in components of operating assets and liabilities | $ | (28,354 | ) |  | $ | 18,878 |

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