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Fair Value Measurements
 6 Months Ended
Jun. 30, 2015
Fair Value Disclosures [Abstract]  
Fair Value Measurements
(11) Fair Value Measurements

In accordance with ASC Topic 820 — Fair Value Measurements and Disclosures ("ASC 820"), the Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets, liabilities or a group of assets or liabilities, such as a business.

ASC 820 utilizes a fair value hierarchy that prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The following is a brief description of those three levels:

•
Level 1 — Quoted prices in active markets for identical assets and liabilities

•
Level 2 — Other significant observable inputs (including quoted prices in active markets for similar assets or liabilities)

•
Level 3 — Significant unobservable inputs (including the Company's own assumptions in determining the fair value)

The following table sets forth the assets and liabilities measured at fair value on a recurring basis, by input level, as of June 30, 2015 and December 31, 2014:
 
June 30, 2015
 
Level 1

Level 2

Level 3

Total
 
(in millions)
Location and Description
 
 
 
 
 
 
 
Cash equivalents
$
61.0

 
$
—

 
$
—

 
$
61.0

Other current assets (investments)
0.3

 
—

 
—

 
0.3

Other current assets (other derivative agreements)
—

 
14.4

 
—

 
14.4

Other long-term assets (other derivative agreements)
—

 
8.5

 
—

 
8.5

Total Assets
$
61.3

 
$
22.9

 
$
—

 
$
84.2

Other current liabilities (other derivative agreements)
—

 
(4.8
)
 
—

 
(4.8
)
Other current liabilities (interest rate swaps)
—

 
(0.6
)
 
—

 
(0.6
)
Other current liabilities (biofuel blending obligations)
—

 
(13.8
)
 
—

 
(13.8
)
Total Liabilities
$
—

 
$
(19.2
)
 
$
—

 
$
(19.2
)

 
December 31, 2014
 
  Level 1
 
  Level 2
 
  Level 3
 
Total
 
(in millions)
Location and Description
 
 
 
 
 
 
 
Cash equivalents
$
69.0

 
$
—

 
$
—

 
$
69.0

Other current assets (investments)
73.9

 
2.7

 
—

 
76.6

Other current assets (other derivative agreements)
—

 
25.0

 
—

 
25.0

Other long-term assets (other derivative agreements)
—

 
22.3

 
—

 
22.3

Total Assets
$
142.9

 
$
50.0

 
$
—

 
$
192.9

Other current liabilities (interest rate swaps)
—

 
(0.8
)
 
—

 
(0.8
)
Other current liabilities (biofuel blending obligation)
—

 
(49.6
)
 
—

 
(49.6
)
Other long-term liabilities (interest rate swaps)
—

 
(0.2
)
 
—

 
(0.2
)
Total Liabilities
$
—

 
$
(50.6
)
 
$
—

 
$
(50.6
)


As of June 30, 2015 and December 31, 2014, the only financial assets and liabilities that are measured at fair value on a recurring basis are the Company's cash equivalents, investments, derivative instruments and the uncommitted biofuel blending obligation. Additionally, the fair value of the Company's debt issuances is disclosed in Note 8 ("Long-Term Debt"). The Refining Partnership's commodity derivative contracts and the uncommitted biofuel blending obligation, which use fair value measurements and are valued using broker quoted market prices of similar instruments, are considered Level 2 inputs. The Nitrogen Fertilizer Partnership has interest rate swaps that are measured at fair value on a recurring basis using Level 2 inputs. The fair value of these interest rate swap instruments are based on discounted cash flow models that incorporate the cash flows of the derivatives, as well as the current LIBOR rate and a forward LIBOR curve, along with other observable market inputs.

The Company's investments in marketable securities are reported at fair market value using quoted market prices. During the six months ended June 30, 2015, the Company received proceeds of $68.0 million for the sale of a portion of its investment in available-for-sale securities. The aggregate cost basis for the available-for-sale securities sold was approximately $47.9 million. Upon the sale of the available-for-sale securities, the Company reclassified an unrealized gain of $20.1 million from accumulated other comprehensive income ("AOCI") and recognized a realized gain in other income in the Consolidated Statements of Operations for the six months ended June 30, 2015. At the end of the first quarter of 2015, the Company's remaining available-for-sale securities with an aggregate cost basis of approximately $25.7 million were reclassified to trading securities based on management's ability and intent with respect to the securities. In connection with the transfer to trading securities, an unrealized gain previously recorded in AOCI of $11.7 million was reclassified to other income and is reflected in the Condensed Consolidated Statements of Operations for the six months ended June 30, 2015. During the three months ended June 30, 2015, the trading securities were sold, and the Company received proceeds of $37.8 million and recognized an additional realized gain of $0.4 million in other income for the three and six months ended June 30, 2015. The Company had no transfers of assets or liabilities between any of the above levels during the six months ended June 30, 2015.