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Fair Value Measurements (Tables)
 6 Months Ended
Jun. 30, 2015
Fair Value Disclosures [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions
Significant inputs used in the Monte Carlo simulation analysis include: 
 
June 30, 2015
 
December 31, 2014
Stock price
$18.72
 
$16.25
Weighted average exercise price
$0.10
 
$0.10
Term (years)
7.17
 
7.67
Risk-free rate
2.09%
 
2.01%
Expected volatility
44.5%
 
50.2%
Fair Value, Assets Measured on Recurring Basis
Our assets and liabilities measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014 and their level within the fair value hierarchy are as follows (in thousands): 
 
June 30, 2015
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
Common stock warrants
$
(13,832
)
 
$
—

 
$
—

 
$
(13,832
)
Contingent consideration
(23,555
)
 
—

 
—

 
(23,555
)
Commodity derivatives
589

 
(612
)
 
1,201

 
—


 
December 31, 2014
 
Fair Value
 
Level 1
 
Level 2
 
Level 3
Common stock warrants
$
(12,123
)
 
$
—

 
$
—

 
$
(12,123
)
Contingent consideration
(9,131
)
 
—

 
—

 
(9,131
)
Commodity derivatives
1,015

 
1,015

 
—

 
—

Our assets and liabilities measured at fair value on a recurring basis as of June 30, 2015 and December 31, 2014 and their placement within our unaudited condensed consolidated balance sheets consist of the following (in thousands): 
 
Balance Sheet Location
 
June 30, 2015
 
December 31, 2014
 
 
 
Asset (Liability)
Common stock warrants
Common stock warrants
 
$
(13,832
)
 
$
(12,123
)
Contingent consideration
Contingent consideration
 
(23,555
)
 
(9,131
)
Exchange traded futures(1)
Other accrued liabilities
 
(1,229
)
 
—

Exchange traded futures
Prepaid and other current assets
 
—

 
1,015

Exchange traded options
Prepaid and other current assets
 
617

 
—

OTC swaps
Prepaid and other current assets
 
1,201

 
—
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location
The following table summarizes the pre-tax gains (losses) recognized in Net income (loss) on our unaudited condensed consolidated statement of operations resulting from changes in assets and liabilities valued at fair value (in thousands): 
 
Income Statement Classification
 
Three Months Ended 
 June 30, 2015
 
Three Months Ended 
 June 30, 2014
 
Six Months Ended 
 June 30, 2015
 
Six Months Ended 
 June 30, 2014
Common stock warrants
Change in value of common stock warrants
 
$
3,313

 
$
140

 
$
(1,709
)
 
$
1,717

Contingent consideration
Change in value of contingent consideration
 
(9,495
)
 
2,297

 
(14,424
)
 
4,762

Exchange traded futures
Cost of revenues
 
1,338

 
(340
)
 
762

 
(191
)
Commodities - physical forward contracts
Cost of revenues
 
—

 
(625
)
 
—

 
(1,141
)
Exchange traded options
Cost of revenues
 
1,763

 
—

 
609

 
—

OTC swaps
Cost of revenues
 
1,201

 
—

 
1,201

 
—
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
A roll forward of Level 3 derivative instruments measured at fair value on a recurring basis is as follows (in thousands): 
 
Three Months Ended 
 June 30, 2015
 
Three Months Ended 
 June 30, 2014
 
Six Months Ended 
 June 30, 2015
 
Six Months Ended 
 June 30, 2014
Balance, at beginning of period
$
(31,205
)
 
$
(25,274
)
 
$
(21,254
)
 
$
(29,316
)
Settlements
—

 
—

 
—

 
—

Acquired
—

 
—

 
—

 
—

Total unrealized income (loss) included in earnings
(6,182
)
 
2,437

 
(16,133
)
 
6,479

Balance, at end of period
$
(37,387
)
 
$
(22,837
)
 
$
(37,387
)
 
$
(22,837
)
Fair Value and Carrying Value Liabilities Measured On Recurring Basis
The carrying value and fair value of long-term debt and other financial instruments as of June 30, 2015 and December 31, 2014 are as follows (in thousands):
 
June 30, 2015
 
Carrying Value
 
Fair Value (1)
Term Loan
$
93,521

 
$
100,514

HIE Retail Credit Agreement (2)
28,928

 
28,928

Mid Pac Credit Agreement (2)
48,958

 
48,958

Common stock warrants
13,832

 
13,832

Contingent consideration
23,555

 
23,555

 
December 31, 2014
 
Carrying Value
 
Fair Value (1)
Term Loan
$
87,360

 
$
87,068

HIE Retail Credit Agreement (2)
22,750

 
22,750

Texadian Uncommitted Credit Agreement
26,500

 
26,500

Common stock warrants
12,123

 
12,123

Contingent consideration
9,131

 
9,131


_________________________________________________________ 
(1) The fair values of these instruments are considered Level 3 measurements in the fair value hierarchy.
(2) Fair value approximates carrying value due to the floating rate interest which approximates a current market rate.