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Derivatives (Tables)
 3 Months Ended
Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Offsetting Assets and Liabilities The following tables summarize (i) the Company's commodity derivative contracts on a gross basis, (ii) the effects of netting assets and liabilities for which the right of offset exists based on master netting arrangements and (iii) for the Company’s net derivative liability positions, the applicable portion of shared collateral under the credit facility as of March 31, 2018, and December 31, 2017 (in thousands):

March 31, 2018
 
 
Gross Amounts
 
Gross Amounts Offset
 
Amounts Net of Offset
 
Financial Collateral
 
Net Amount
Assets
 
 
 
 
 
 
 
 
 
 
Derivative contracts - current
 
$
3,040

 
$
(3,040
)
 
$
—

 
$
—

 
$
—

Derivative contracts - noncurrent
 
—

 
—

 
—

 
—

 
—

Total
 
$
3,040

 
$
(3,040
)
 
$
—

 
$
—

 
$
—

Liabilities
 
 
 
 
 
 
 
 
 
 
Derivative contracts - current
 
$
22,992

 
$
(3,040
)
 
$
19,952

 
$
(19,952
)
 
$
—

Derivative contracts - noncurrent
 
5,143

 
—

 
5,143

 
(5,143
)
 
—

Total
 
$
28,135

 
$
(3,040
)
 
$
25,095

 
$
(25,095
)
 
$
—


December 31, 2017
 
 
Gross Amounts
 
Gross Amounts Offset
 
Amounts Net of Offset
 
Financial Collateral
 
Net Amount
Assets
 
 
 
 
 
 
 
 
 
 
Derivative contracts - current
 
$
5,582

 
$
(4,272
)
 
$
1,310

 
$
—

 
$
1,310

Derivative contracts - noncurrent
 
—

 
—

 
—

 
—

 
—

Total
 
$
5,582

 
$
(4,272
)
 
$
1,310

 
$
—

 
$
1,310

Liabilities
 
 
 
 
 
 
 
 
 
 
Derivative contracts - current
 
$
14,899

 
$
(4,272
)
 
$
10,627

 
$
(10,627
)
 
$
—

Derivative contracts - noncurrent
 
3,568

 
—

 
3,568

 
(3,568
)
 
—

Total
 
$
18,467

 
$
(4,272
)
 
$
14,195

 
$
(14,195
)
 
$
—
Open Oil and Natural Gas Commodity Derivative Contracts At March 31, 2018, the Company’s open commodity derivative contracts consisted of the following:

Oil Price Swaps 
 
Notional (MBbls)
 
Weighted Average
Fixed Price
April 2018 - December 2018
2,749

 
$
55.87

January 2019 - December 2019
1,825

 
$
54.29


Natural Gas Price Swaps
 
Notional (MMcf)
 
Weighted Average
Fixed Price
April 2018 - December 2018
11,000

 
$
3.11
Fair Value of Derivatives The following table presents the fair value of the Company’s derivative contracts as of March 31, 2018, and December 31, 2017, on a gross basis without regard to same-counterparty netting (in thousands):
Type of Contract
 
Balance Sheet Classification
 
March 31,
2018
 
December 31,
2017
Derivative assets
 
 
 
 
 
 
Natural gas price swaps
 
Derivative contracts-current
 
$
3,040

 
$
5,582

Derivative liabilities
 
 
 
 
 
 
Oil price swaps
 
Derivative contracts-current
 
(22,992
)
 
(14,899
)
Oil price swaps
 
Derivative contracts-noncurrent
 
(5,143
)
 
(3,568
)
Total net derivative contracts
 
$
(25,095
)
 
$
(12,885
)