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STATEMENTS OF CASH FLOWS (Tables)
 9 Months Ended
Sep. 30, 2015
Statement of Cash Flows [Abstract]  
Changes in current assets and liabilities
Changes in current assets and current liabilities were as follows: 
 
Nine Months Ended September 30,
 
2015
 
2014
 
(Thousands of Dollars)
Decrease (increase) in current assets:
 
 
 
Receivable from related parties
$
(501
)
 
$
1,338

Income tax receivable
—

 
(403
)
Other receivables
91

 
(386
)
Other current assets
147

 
(27
)
Increase (decrease) in current liabilities:
 
 
 
Accounts payable
(216
)
 
(303
)
Accrued compensation expense
3,949

 
10,690

Accrued liabilities
38

 
(136
)
Taxes other than income tax
(378
)
 
(316
)
Changes in current assets and current liabilities
$
3,130

 
$
10,457
Cash flows related to interest and income tax
Cash flows related to interest and income tax were as follows:
 
Nine Months Ended September 30,
 
2015
 
2014
 
(Thousands of Dollars)
Cash paid for interest
$
548

 
$
503

Cash refunded for income tax
$
(50
)
 
$
(7
)