Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2020

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,
	2020		2019		2018
(Increase) decrease in:
Accounts receivable	$	88,116	$	(80,126)	$	130,573
Inventories	(34,740)		7,659		20,963
Deferred charges	24,590		4,093		(5,826)
Other current assets	1,188		(4,874)		9,337
Increase (decrease) in:
Accounts payable	(9,742)		81,915		(130,991)
Accrued liabilities	(30,785)		(79,765)		(26,208)
Net changes in components of operating assets and liabilities	$	38,627	$	(71,098)	$	(2,152)