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Supplemental Cash Flow Information
 3 Months Ended
Mar. 31, 2020
Supplemental Cash Flow Elements [Abstract]  
Supplemental Cash Flow Information Supplemental Cash Flow Information
The following table provides information regarding the net changes in components of operating assets and liabilities.
 
 
Three Months Ended March 31,
 
2020
 
2019
(Increase) decrease in:
 
 
 
Accounts receivable
$
101,405

 
$
18,170

Inventories
(5,024
)
 
(6,616
)
Deferred charges
2,783

 
(4,092
)
Other current assets
(3,746
)
 
(5,067
)
Increase (decrease) in:
 
 
 
Accounts payable
(62,365
)
 
5,226

Accrued liabilities
(25,519
)
 
(4,421
)
Net changes in components of operating assets and liabilities
$
7,534

 
$
3,200


Payments of interest and commitment fees were $33.7 million and $39.5 million for the three months ended March 31, 2020 and March 31, 2019, respectively. We capitalized interest of $0.5 million and $0.7 million during the three months ended March 31, 2020 and March 31, 2019, respectively.
At March 31, 2020 and March 31, 2019, we had incurred liabilities for fixed and intangible asset additions totaling $17.2 million and $13.1 million, respectively, that had not been paid at the end of the quarter, and, therefore, were not included in the caption “Payments to acquire fixed and intangible assets” under Cash Flows from Investing Activities in the Unaudited Condensed Consolidated Statements of Cash Flows.