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Derivatives (Tables)
 9 Months Ended
Sep. 30, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Outstanding Derivatives Entered Into to Hedge Inventory or Fixed Price Purchase Commitments
At September 30, 2018, we had the following outstanding derivative commodity contracts that were entered into to economically hedge inventory or fixed price purchase commitments.
 
 
Sell (Short)
Contracts
 
Buy (Long)
Contracts
Designated as hedges under accounting rules:
 
 
 
 
Crude oil futures:
 
 
 
 
Contract volumes (1,000 bbls)
 
50

 
—

Weighted average contract price per bbl
 
$
69.14

 
$
—

 
 
 
 
 
Not qualifying or not designated as hedges under accounting rules:
 
 
 
 
Crude oil futures:
 
 
 
 
Contract volumes (1,000 bbls)
 
315

 
221

Weighted average contract price per bbl
 
$
68.70

 
$
68.15

Natural gas swaps:
 
 
 
 
Contract volumes (10,000 MMBTU)
 
502

 
—

Weighted average price differential per MMBTU
 
$
0.65

 
$
—

Natural gas futures:
 
 
 
 
Contract volumes (10,000 MMBTU)
 
54

 
507

Weighted average contract price per MMBTU
 
$
3.01

 
$
2.82

Diesel futures:
 
 
 
 
Contract volumes (1,000 bbls)
 
15

 
5

Weighted average contract price per bbl
 
$
2.29

 
$
2.23

NYM RBOB Gas futures:
 
 
 
 
Contract volumes (42,000 gallons)
 
22

 
12

Weighted average contract price per gallon
 
$
2.03

 
$
2.00

Fuel oil futures:
 
 
 
 
Contract volumes (1,000 bbls)
 
255

 
—

Weighted average contract price per bbl
 
$
65.90

 
$
—

Crude oil options:
 
 
 
 
Contract volumes (1,000 bbls)
 
50

 
10

Weighted average premium received
 
$
1.34

 
$
0.31
Schedule of Fair Value of Derivative Assets and Liabilities
The following tables reflect the estimated fair value gain (loss) position of our derivatives at September 30, 2018 and December 31, 2017:
Fair Value of Derivative Assets and Liabilities
 
 
Unaudited Condensed Consolidated Balance Sheets Location
 
Fair Value
 
September 30,
2018
 
December 31,
2017
Asset Derivatives:
 
 
 
 
 
Commodity derivatives - futures and call options (undesignated hedges):
 
 
 
 
 
Gross amount of recognized assets
Current Assets - Other
 
$
1,481

 
$
505

Gross amount offset in the Unaudited Condensed Consolidated Balance Sheets
Current Assets - Other
 
(1,481
)
 
(505
)
Net amount of assets presented in the Unaudited Condensed Consolidated Balance Sheets related to commodity derivatives
 
 
$
—

 
$
—

Natural Gas Swap (undesignated hedge)
Current Assets - Other
 
170

 
—

Commodity derivatives - futures and call options (designated hedges):
 
 
 
 
 
Gross amount of recognized assets
Current Assets - Other
 
$
28

 
$
54

Gross amount offset in the Unaudited Condensed Consolidated Balance Sheets
Current Assets - Other
 
(28
)
 
(54
)
Net amount of assets presented in the Unaudited Condensed Consolidated Balance Sheets related to commodity derivatives
 
 
$
—

 
$
—

Liability Derivatives:
 
 
 
 
 
Preferred Distribution Rate Reset Election (2)
Other long-term liabilities
 
(48,572
)
 
(45,209
)
Natural Gas Swap (undesignated hedge)
Current Liabilities - Accrued Liabilities
 
(28
)
 
—

Commodity derivatives - futures and call options (undesignated hedges):
 
 
 
 
 
Gross amount of recognized liabilities
Current Assets - Other (1)
 
$
(2,879
)
 
$
(1,203
)
Gross amount offset in the Unaudited Condensed Consolidated Balance Sheets
Current Assets - Other (1)
 
2,660

 
1,203

Net amount of liabilities presented in the Unaudited Condensed Consolidated Balance Sheets related to commodity derivatives
 
 
$
(219
)
 
$
—

Commodity derivatives - futures and call options (designated hedges):
 
 
 
 
 
Gross amount of recognized liabilities
Current Assets - Other (1)
 
$
(230
)
 
$
(863
)
Gross amount offset in the Unaudited Condensed Consolidated Balance Sheets
Current Assets - Other (1)
 
—

 
338

Net amount of liabilities presented in the Unaudited Condensed Consolidated Balance Sheets related to commodity derivatives
 
 
$
(230
)
 
$
(525
)
 (1)
These derivative liabilities have been funded with margin deposits recorded in our Unaudited Condensed Consolidated Balance Sheets under Current Assets - Other.
(2) Refer to Note 10 and Note 16 for additional discussion surrounding the Preferred Distribution Rate Reset Election derivative.
Schedule of Effect on Operating Results
Effect on Operating Results 
 
 
 
Amount of Gain (Loss) Recognized in Income
 
Unaudited Condensed Consolidated Statements of Operations Location
 
Three Months Ended
September 30,
 
Nine Months Ended
September 30,
 
 
2018
 
2017
 
2018
 
2017
Commodity derivatives - futures and call options:
 
 
 
 
 
 
 
 
 
Contracts designated as hedges under accounting guidance
Onshore facilities and transportation product costs
 
$
759

 
$
(3,399
)
 
$
(2,028
)
 
$
8,433

Contracts not considered hedges under accounting guidance
Onshore facilities and transportation product costs, sodium minerals and sulfur services operating costs
 
(1,157
)
 
(1,329
)
 
(6,833
)
 
650

Total commodity derivatives
 
 
$
(398
)
 
$
(4,728
)
 
$
(8,861
)
 
$
9,083

 
 
 
 
 
 
 
 
 
 
Natural Gas Swap Liability
Sodium minerals and sulfur services operating costs
 
$
229

 
$
—

 
$
44

 
$
—

 
 
 
 
 
 
 
 
 
 
Preferred Distribution Rate Reset Election
Other income (expense)
 
$
1,826

 
$
(2,276
)
 
$
(268
)
 
$
(2,276
)