Supplemental Cash Flow Information

12 Months Ended

Dec. 31, 2021

Supplemental Cash Flow Elements [Abstract]

The following table provides information regarding the net changes in components of operating assets and liabilities:


	Year Ended December 31,
	2021		2020		2019
(Increase) decrease in:
Accounts receivable	$	(75,165)	$	88,116	$	(80,126)
Inventories	20,370		(34,740)		7,659
Deferred charges	27,390		24,590		4,093
Other current assets	(1,190)		1,188		(4,874)
Increase (decrease) in:
Accounts payable	44,119		(9,742)		81,915
Accrued liabilities	14,520		(30,785)		(79,765)
Net changes in components of operating assets and liabilities	$	30,044	$	38,627	$	(71,098)

Payments of interest and commitment fees were $202.0 million, $200.6 million and $212.4 million during the years ended December 31, 2021, 2020 and 2019, respectively. We capitalized interest of $4.4 million, $1.9 million and $3.7 million during the years ended December 31, 2021, 2020 and 2019, respectively.

During the years ended December 31, 2021, 2020 and 2019, we paid taxes of $0.7 million, $0.8 million and $0.8 million, respectively.

At December 31, 2021, 2020 and 2019, we had incurred liabilities for fixed and intangible asset additions totaling $51.7 million, $29.1 million and $22.6 million, respectively, which had not been paid at the end of the year. Therefore, these amounts were not included in the caption “Payments to acquire fixed and intangible assets” under Cash Flows from Investing Activities in the Consolidated Statements of Cash Flows. The increase in this amount is principally due to the increase in capital expenditures associated with our Granger Optimization Project (Note11).