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Supplemental Cash Flow Information
 3 Months Ended
Mar. 31, 2019
Supplemental Cash Flow Information [Abstract]  
SUPPLEMENTAL CASH FLOW INFORMATION SUPPLEMENTAL CASH FLOW INFORMATION
The following table summarizes the changes in the components of operating assets and liabilities shown on our condensed consolidated statements of cash flows (in thousands):
 
Three Months Ended March 31,
 
2019
 
2018
Decrease (increase) in restricted cash
$
—

 
$
33

Decrease (increase) in accounts receivable
(191,275
)
 
122,829

Decrease (increase) in receivable from affiliates
(239
)
 
754

Decrease (increase) in inventories
(27,723
)
 
25,220

Decrease (increase) in other current assets
2,830

 
(3,748
)
Decrease (increase) in other assets
299

 
805

Increase (decrease) in accounts payable and accrued liabilities
211,041

 
(104,888
)
Increase (decrease) in payable to affiliates
(2,674
)
 
(4,650
)
Increase (decrease) in other noncurrent liabilities
13,686

 
16,142

 
$
5,945

 
$
52,497

  
Other supplemental disclosures
We paid cash interest of $45.2 million and $45.8 million for the three months ended March 31, 2019 and 2018, respectively.
We paid cash income taxes, net of refunds, of $0.9 million and $1.8 million for the three months ended March 31, 2019 and 2018, respectively.
We incurred liabilities for capital expenditures that had not been paid of $43.5 million and $66.6 million as of March 31, 2019 and 2018, respectively. Such amounts are not included in capital expenditures on the condensed consolidated statements of cash flows.