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SCHEDULE II - VALUATION RESERVES
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II – VALUATION RESERVES
 
Description
Balance at beginning
of year
 
Additions to costs and expenses
 
 
Deductions
 
Balance
at end
of year
Year ended December 31, 2018
 
 
 
 
 
 
 
Reserve deducted in the balance sheet from the assets to which it applies
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
2,974

 
$
541

 
$
(111
)
 
$
3,404

 
 
 
 
 
 
 
 
Year ended December 31, 2017
 

 
 

 
 

 
 

Reserve deducted in the balance sheet from the assets to which it applies
 
 
 
 
 
 
 
Allowance for doubtful accounts
$
3,344

 
$
(362
)
 
$
(8
)
 
$
2,974

 
 
 
 
 
 
 
 
Year ended December 31, 2016
 

 
 

 
 

 
 

Reserve deducted in the balance sheet from the assets to which it applies
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
4,527

 
$
224

 
$
(1,407
)
 
$
3,344