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Fair-Value Measurements (Tables)
 12 Months Ended
Dec. 31, 2016
Fair Value Disclosures [Abstract]  
Placement Of Assets And Liabilities Within The Fair Value Hierarchy Levels
The following table sets forth by level within the fair value hierarchy our financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2016 and 2015.
 
 
December 31, 2016
 
December 31, 2015
Recurring Fair Value Measures
Level 1
 
Level 2
 
Level 3
 
Level 1
 
Level 2
 
Level 3
Commodity derivatives:
 
 
 
 
 
 
 
 
 
 
 
Assets
$
3,764

 
$
—

 
$
—

 
$
1,703

 
$
—

 
$
—

Liabilities
$
(11,278
)
 
$
—

 
$
—

 
$
(411
)
 
$
—

 
$
—