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DERIVATIVE FINANCIAL INSTRUMENTS Derivative Financial Instruments (Tables)
 12 Months Ended
Dec. 31, 2013
Derivative Instruments Not Designated as Hedging Instruments [Abstract]  
Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
The following table presents the location and fair value amounts of our derivative instruments on the consolidated balance sheets as of December 31, 2013 and 2012:
 
Derivatives instruments:
 
Balance sheet line item
 
2013
 
2012
 
 
 
 
 
(in thousands)
Derivative assets:
Current
 
 
 
 
 
 
 
Commodity contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
$
2,016

 
$
46,657

 
Related to affiliated partnerships (1)
 
Fair value of derivatives
 
—

 
4,707

 
Related to natural gas marketing
 
Fair value of derivatives
 
361

 
319

 
Basis protection contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
195

 
359

 
 
 
 
 
2,572

 
52,042

 
Non Current
 
 
 
 
 
 
 
Commodity contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
5,055

 
6,653

 
Related to natural gas marketing
 
Fair value of derivatives
 
278

 
212

 
Basis protection contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
268

 
18

 
 
 
 
 
5,601

 
6,883

Total derivative assets
 
 
 
 
$
8,173

 
$
58,925

 
 
 
 
 
 
 
 
Derivative liabilities:
Current
 
 
 
 
 
 
 
Commodity contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
$
15,263

 
$
1,698

 
Related to natural gas marketing
 
Fair value of derivatives
 
247

 
226

 
Basis protection contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
—

 
14,375

 
Related to affiliated partnerships (2)
 
Fair value of derivatives
 
—

 
2,140

 
Related to natural gas marketing
 
Fair value of derivatives
 
5

 
—

 
 
 
 
 
15,515

 
18,439

 
Non Current
 
 
 
 
 
 
 
Commodity contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
2,782

 
9,828

 
Related to natural gas marketing
 
Fair value of derivatives
 
233

 
168

 
Basis protection contracts
 
 
 
 
 
 
 
Related to crude oil and natural gas sales
 
Fair value of derivatives
 
—

 
141

 
 
 
 
 
3,015

 
10,137

Total derivative liabilities
 
 
 
 
$
18,530

 
$
28,576

__________
(1)
Represents derivative positions designated to our affiliated partnerships. Accordingly, our accompanying consolidated balance sheets include a corresponding payable to our affiliated partnerships representing their proportionate share of the derivative assets.
(2)
Represents derivative positions designated to our affiliated partnerships. Accordingly, our accompanying consolidated balance sheets include a corresponding receivable from our affiliated partnerships representing their proportionate share of the derivative liabilities.

    
The following table presents the impact of our derivative instruments on our consolidated statements of operations:


 
Year Ended December 31,
Consolidated statement of operations line item
 
2013
 
2012
 
2011

 
 
Commodity price risk management gain (loss), net
 
 
 
 
 
 
Net settlements
 
$
12,913

 
$
49,416

 
$
17,243

Net change in fair value of unsettled derivatives
 
(36,818
)
 
(17,077
)
 
28,847

Total commodity price risk management gain (loss), net
 
$
(23,905
)
 
$
32,339

 
$
46,090

Sales from natural gas marketing
 
 
 
 
 
 
Net settlements
 
$
446

 
$
2,170

 
$
2,970

Net change in fair value of unsettled derivatives
 
429

 
(1,658
)
 
(161
)
Total sales from natural gas marketing
 
$
875

 
$
512

 
$
2,809

Cost of natural gas marketing
 
 
 
 
 
 
Net settlements
 
$
(257
)
 
$
(2,029
)
 
$
(2,571
)
Net change in fair value of unsettled derivatives
 
(412
)
 
1,601

 
(85
)
Total cost of natural gas marketing
 
$
(669
)
 
$
(428
)
 
$
(2,656
)

 
 
 
 
 
 

All of our financial derivative agreements contain master netting provisions that provide for the net settlement of all contracts through a single payment in the event of early termination. Our fixed-price physical purchase and sale agreements that qualify as derivative contracts are not subject to master netting provisions and are not significant. We have elected not to offset the fair value positions recorded on our consolidated balance sheets.

The following table reflects the impact of netting agreements on gross derivative assets and liabilities as of December 31, 2013 and 2012:
As of December 31, 2013
 
Derivatives instruments, recorded in consolidated balance sheet, gross
 
Effect of master netting agreements
 
Derivative instruments, net
 
 
(in thousands)
Asset derivatives:
 
 
 
 
 
 
Derivative instruments, at fair value
 
$
8,173

 
$
(5,623
)
 
$
2,550

 
 
 
 
 
 
 
Liability derivatives:
 
 
 
 
 
 
Derivative instruments, at fair value
 
$
18,530

 
$
(5,623
)
 
$
12,907

 
 
 
 
 
 
 
As of December 31, 2012
 
Derivatives instruments, recorded in consolidated balance sheet, gross
 
Effect of master netting agreements
 
Derivative instruments, net
 
 
(in thousands)
Asset derivatives:
 
 
 
 
 
 
Derivative instruments, at fair value
 
$
58,925

 
$
(11,437
)
 
$
47,488

 
 
 
 
 
 
 
Liability derivatives:
 
 
 
 
 
 
Derivative instruments, at fair value
 
$
28,576

 
$
(11,437
)
 
$
17,139