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STATEMENTS OF CASH FLOWS (Tables)
 3 Months Ended
Mar. 31, 2014
Statement of Cash Flows [Abstract]  
Changes in current assets and liabilities
Changes in current assets and current liabilities were as follows:
 
 
Three Months Ended March 31,
 
2014
 
2013
 
(Thousands of Dollars)
Decrease (increase) in current assets:
 
 
 
Receivable from related parties
$
(4,497
)
 
$
(6,298
)
Income tax receivable
—

 
(23
)
Other receivables
(429
)
 
(158
)
Other current assets
(23
)
 
15

Increase (decrease) in current liabilities:
 
 
 
Accounts payable
73

 
(601
)
Accrued compensation expense
3,642

 
4,315

Accrued liabilities
—

 
(41
)
Taxes other than income tax
(1,101
)
 
(992
)
Changes in current assets and current liabilities
$
(2,335
)
 
$
(3,783
)
Cash flows related to interest and income tax
Cash flows related to interest and income tax were as follows:
 
 
Three Months Ended March 31,
 
2014
 
2013
 
(Thousands of Dollars)
Cash paid for interest
$
172

 
$
96

Cash paid for income tax
$
1

 
$
—