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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2015
Fair Value Disclosures [Abstract]  
Hierarchy of Fair Value, Assets and Liabilities Measured on Recurring Basis
The following tables set forth by level within the fair value hierarchy the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis:
 
 
At fair value as of December 31, 2015
 
Level 1
 
Level 2
 
Level 3
 
Total
 
(In thousands)
Assets:
 
 
 
 
 
 
 
Money market funds
$
742

 
$

 
$

 
$
742

Commodity derivative instruments (see Note 4)

 
155,473

 

 
155,473

Total assets
$
742

 
$
155,473

 
$

 
$
156,215

 
 
 
 
 
 
 
 
 
At fair value as of December 31, 2014
 
Level 1
 
Level 2
 
Level 3
 
Total
 
(In thousands)
Assets:
 
 
 
 
 
 
 
Money market funds
$
742

 
$

 
$

 
$
742

Commodity derivative instruments (see Note 4)

 
315,507

 

 
315,507

Total assets
$
742

 
$
315,507

 
$

 
$
316,249