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Product Sales Revenues
 6 Months Ended
Jun. 30, 2016
Product Sales Revenue [Abstract]  
Product Sales Revenues
Product Sales Revenue
The amounts reported as product sales revenue on our consolidated statements of income include revenue from the physical sale of petroleum products and mark-to-market adjustments from New York Mercantile Exchange (“NYMEX”) contracts. See Note 8 – Derivative Financial Instruments for a discussion of our commodity hedging strategies and how our NYMEX contracts impact product sales revenue. All of the petroleum products inventory we physically sell associated with our butane blending and fractionation activities, as well as the barrels from product gains we obtain from our operations, are reported as product sales revenue on our consolidated statements of income.
For the three and six months ended June 30, 2015 and 2016, product sales revenue included the following (in thousands): 
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2015
 
2016
 
2015
 
2016
Physical sale of petroleum products
$
133,319

 
$
135,459

 
$
302,566

 
$
266,039

Change in value of NYMEX contracts
(23,350
)
 
(11,770
)
 
(19,470
)
 
4,212

Total product sales revenue
$
109,969

 
$
123,689

 
$
283,096

 
$
270,251