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Inventories
12 Months Ended
Dec. 31, 2015
Inventory Disclosure [Abstract]  
Inventories
Inventories
 
Inventories consisted of the following:
 
 
December 31,
(Thousands of dollars)
 
2015
 
2014
Finished products - FIFO basis
 
$
159,774

 
$
200,272

Less LIFO - finished products
 
(102,849
)
 
(144,283
)
Finished products - LIFO basis
 
56,925

 
55,989

Store merchandise for resale
 
94,925

 
98,712

Materials and supplies
 
4,056

 
2,345

Total inventories
 
$
155,906

 
$
157,046


 
At December 31, 2015 and 2014, the replacement cost (market value) of last-in, first-out (LIFO) inventories exceeded the LIFO carrying value by $102,849,000 and $144,283,000, respectively.
 
In 2014, inventories valued at LIFO incurred a decrement that resulted in a benefit of $19,512,000 on income from continuing operations before income tax.  Inventories valued at LIFO incurred a decrement that resulted in a charge to earnings of $13,472,000 at December 31, 2013.