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Allowance for Doubtful Accounts (Tables)
 12 Months Ended
Dec. 31, 2017
Valuation Allowance [Abstract]  
Allowance for Doubtful Accounts
The table below presents a rollforward of our allowance for doubtful accounts for the year ended December 31, 2017, the period from December 16, 2016 through December 31, 2016, the period from January 1, 2016 through December 15, 2016 and the year ended December 31, 2015 (in thousands):
 
 
 
 
 
 
 
Balance at
Beginning
of Period
 
Charged to
Expense
 
Deductions
 
Balance at
End of
Period
Successor:
 
 
 
 
 
 
 
As of December 31, 2017
$
168

 
$
1,420

 
$
(713
)
 
875

As of December 31, 2016
—

 
168

 
—

 
168

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Predecessor:
 
 
 
 
 
 
 
As of December 15, 2016
20,915

 
2,532

 
(20,404
)
 
3,043

As of December 31, 2015
2,925

 
21,172

 
(3,182
)
 
20,915