v3.8.0.1
STATEMENTS OF CASH FLOWS (Tables)
 3 Months Ended
Mar. 31, 2018
Statement of Cash Flows [Abstract]  
Schedule of Changes in Current Assets and Liabilities [Text Block]
Changes in current assets and current liabilities were as follows:
 
Three Months Ended March 31,
 
2018
 
2017
 
(Thousands of Dollars)
Decrease (increase) in current assets:
 
 
 
Accounts receivable
$
19,525

 
$
3,544

Receivable from related party
133

 
237

Inventories
(2,687
)
 
1,658

Other current assets
3,224

 
307

Increase (decrease) in current liabilities:
 
 
 
Accounts payable
(7,681
)
 
(12,154
)
Accrued interest payable
3,552

 
(6,301
)
Accrued liabilities
(6,019
)
 
(21,006
)
Taxes other than income tax
(1,558
)
 
(2,752
)
Income tax payable
2,202

 
(2,675
)
Changes in current assets and current liabilities
$
10,691

 
$
(39,142
)
Schedule of Supplemental Cash Flow Information [Text Block]
Cash flows related to interest and income taxes were as follows:
 
Three Months Ended March 31,
 
2018
 
2017
 
(Thousands of Dollars)
Cash paid for interest, net of amount capitalized
$
42,549

 
$
42,146

Cash paid for income taxes, net of tax refunds received
$
2,635

 
$
4,828