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Supplemental Cash Flow Information (Tables)
 6 Months Ended
Jun. 30, 2014
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.
 
 
Six Months Ended
June 30,
 
2014
 
2013
(Increase) decrease in:
 
 
 
Accounts receivable
$
20,827

 
$
(82,346
)
Inventories
(44,523
)
 
(858
)
Other current assets
47,542

 
11,135

Increase (decrease) in:
 
 
 
Accounts payable
13,436

 
66,860

Accrued liabilities
(43,971
)
 
3,741

Net changes in components of operating assets and liabilities
$
(6,689
)
 
$
(1,468
)