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Other Financial Information
 12 Months Ended
Dec. 31, 2015
Other Financial Information [Abstract]  
Other Financial Information
Other Financial Information
 
OTHER OPERATING REVENUES – Other operating revenues in the Consolidated and Combined Income Statements includes the following items:
 
(Thousands of dollars)
2015
 
2014
 
2013
Renewable Identification Numbers (RINs) sales
$
117,513

 
$
92,916

 
$
91,391

Other
3,321

 
3,193

 
2,907

Total other operating revenue
$
120,834

 
$
96,109

 
$
94,298


 
CASH FLOW DISCLOSURES — Cash income taxes paid (collected), net of refunds, were $113,520,000,  $158,063,000 and $47,757,000 for the three years ended December 31, 2015, 2014 and 2013, respectively. Interest paid was $31,798,000,  $34,019,000 and $1,647,000 for the years ended December 31, 2015, 2014 and 2013, respectively. Noncash reductions (additions) to net parent investment related primarily to settlement of income taxes were $453,000 for the year ended December 31, 2013.
(Thousands of dollars)
2015
 
2014
 
2013
Accounts receivable
$
2,857

 
$
59,519

 
$
325,063

Inventories
1,121

 
750

 
4,011

Prepaid expenses and other current assets
(27,107
)
 
477

 
(7,755
)
Accounts payable and accrued liabilities
1,043

 
(53,234
)
 
(271,379
)
Income taxes payable
(25,599
)
 
(37,325
)
 
6,892

Current deferred income tax liabilities
1,099

 
(6,662
)
 
(5,628
)
Net decrease (increase) in noncash operating working capital
$
(46,586
)
 
$
(36,475
)
 
$
51,204