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Valuation And Qualifying Accounts
 12 Months Ended
Dec. 31, 2015
Valuation and Qualifying Accounts [Abstract]  
Schedule II – Valuation And Qualifying Accounts
SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS
Year ended December 31,
Beginning
Balance
 
Additions (recoveries) –
charged to
costs and expenses
 
Deductions
 
Ending
Balance
Allowance for doubtful accounts(1)
 
 
 
 
 
 
 
2015
$
61

 
$
153

 
$
—

 
$
214

2014
104

 
233

 
(276
)
 
61

2013
134

 
114

 
(144
)
 
104

Deferred tax asset valuation allowance(2)
 
 
 
 
 
 


2015
$
512

 
$
—

 
$
(385
)
 
$
127

2014
1,229

 
—

 
(717
)
 
512

2013
49,146

 
—

 
(47,917
)
 
1,229

(1) 
We record additions to the allowance for doubtful accounts based on historical collections, write-off experience, current economic trends, and changes in customer payment terms and other factors that may affect our ability to collect payments. Deductions principally reflect amounts charged off as uncollectable, less amounts recovered.
(2) 
Deferred tax assets are reduced by a valuation allowance when, in our opinion, it is more likely than not that the related benefit will not be realized.