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Supplemental Cash Flow Information (Tables)
 6 Months Ended
Jun. 30, 2016
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,
 
2016
 
2015
(Increase) decrease in:
 
 
 
Accounts receivable
$
(21,274
)
 
$
202

Inventories
(34,512
)
 
(7,737
)
Deferred charges
(6,272
)
 
(7,725
)
Other current assets
(4,335
)
 
2,286

Increase (decrease) in:
 
 
 
Accounts payable
(5,642
)
 
(5,998
)
Accrued liabilities
(18,206
)
 
(16,067
)
Net changes in components of operating assets and liabilities
(90,241
)
 
(35,039
)