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Fair Value Measurements (Tables)
 9 Months Ended
Sep. 30, 2018
Fair Value Disclosures [Abstract]  
Summary of Classifications of the Company's Derivative Assets and Liabilities
The following table presents the amounts and classifications of the Company’s derivative assets and liabilities as of September 30, 2018 and December 31, 2017, as well as the potential effect of netting arrangements on contracts with the same counterparty (in thousands):
 
September 30, 2018
 
Level 1
 
Level 2
 
Level 3
 
Gross Fair Value
 
Netting
 
Carrying Value
Assets
 
 
 
 
 
 
 
 
 
 
 
Current commodity derivatives
$
—

 
$
4,282

 
$
—

 
$
4,282

 
$
(4,079
)
 
$
203

Noncurrent commodity derivatives
—

 
908

 
—

 
908

 
(908
)
 
—

Total assets
$
—

 
$
5,190

 
$
—

 
$
5,190

 
$
(4,987
)
 
$
203

Liabilities
 
 
 
 
 
 
 
 
 
 
 
Current commodity derivatives
$
—

 
$
(68,340
)
 
$
—

 
$
(68,340
)
 
$
4,079

 
$
(64,261
)
Noncurrent commodity derivatives
—

 
(19,809
)
 
—

 
(19,809
)
 
908

 
(18,901
)
Total liabilities
$
—

 
$
(88,149
)
 
$
—

 
$
(88,149
)
 
$
4,987

 
$
(83,162
)
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2017
 
Level 1
 
Level 2
 
Level 3
 
Gross Fair Value
 
Netting
 
Carrying Value
Assets
 
 
 
 
 
 
 
 
 
 
 
Current commodity derivatives
$
—

 
$
2,856

 
$
—

 
$
2,856

 
$
(2,704
)
 
$
152

Noncurrent commodity derivatives
—

 
2,182

 
—

 
2,182

 
(1,186
)
 
996

Total assets
$
—

 
$
5,038

 
$
—

 
$
5,038

 
$
(3,890
)
 
$
1,148

Liabilities
 
 
 
 
 
 
 
 
 
 
 
Current commodity derivatives
$
—

 
$
(11,983
)
 
$
—

 
$
(11,983
)
 
$
2,704

 
$
(9,279
)
Noncurrent commodity derivatives
—

 
(2,557
)
 
—

 
(2,557
)
 
1,186

 
(1,371
)
Total liabilities
$
—

 
$
(14,540
)
 
$
—

 
$
(14,540
)
 
$
3,890

 
$
(10,650
)