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Supplemental Cash Flow Information (Tables)
 12 Months Ended
Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]  
Schedule of 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:
 
 
Year Ended December 31,
 
2019
 
2018
 
2017
(Increase) decrease in:
 
 
 
 
 
Accounts receivable
$
(80,126
)
 
$
130,573

 
$
(140,948
)
Inventories
7,659

 
20,963

 
49,055

Deferred charges
4,093

 
(5,826
)
 
(3,622
)
Other current assets
(4,874
)
 
9,337

 
(410
)
Increase (decrease) in:
 
 
 
 
 
Accounts payable
81,915

 
(130,991
)
 
97,569

Accrued liabilities
(79,765
)
 
(26,208
)
 
8,512

Net changes in components of operating assets and liabilities
$
(71,098
)
 
$
(2,152
)
 
$
10,156