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Supplemental Cash Flow Information
 9 Months Ended
Sep. 30, 2018
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):
 
Nine Months Ended September 30,
 
2018
 
2017
Decrease (increase) in restricted cash
$
33

 
$
28

Decrease (increase) in accounts receivable
(14,835
)
 
(36,203
)
Decrease (increase) in receivable from affiliates
793

 
19,924

Decrease (increase) in inventories
57,530

 
(28,297
)
Decrease (increase) in other current assets
(4,007
)
 
(3,409
)
Decrease (increase) in other assets
(3,131
)
 
(17,723
)
Increase (decrease) in accounts payable and accrued liabilities
(37,453
)
 
57,073

Increase (decrease) in payable to affiliates
(5,619
)
 
(21,631
)
Increase (decrease) in other noncurrent liabilities
(3,637
)
 
7,370

 
$
(10,326
)
 
$
(22,868
)
  
Other supplemental disclosures
We paid cash interest of $140.2 million and $58.6 million for the nine months ended September 30, 2018 and 2017, respectively.
We paid cash income taxes, net of refunds, of $15.3 million and $3.1 million for the nine months ended September 30, 2018 and 2017, respectively.
We incurred liabilities for capital expenditures that had not been paid of $55.9 million and $25.0 million as of September 30, 2018 and 2017, respectively. Such amounts are not included in capital expenditures on the condensed consolidated statements of cash flows.
We financed prepayments of insurance premiums of $7.2 million and $6.1 million for the nine months ended September 30, 2018 and 2017, respectively.