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Schedule II Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II Valuation and Qualifying Accounts
Schedule II
Valuation and Qualifying Accounts

Changes in the Company’s allowance for doubtful accounts for accounts receivable for the years ended December 31, 2018, 2017 and 2016 are summarized below:
(in thousands)
 
Balance at Beginning of Year
 
Recoveries added to allowance
 
Bad debt expense
 
Losses charged to allowance
 
Balance at End of Year
Year Ended December, 31 2018
 
 
Allowance for doubtful accounts
 
$
466

 
$
631

 
$
1,983

 
$
(2,546
)
 
$
534

Year Ended December, 31 2017
 
 
Allowance for doubtful accounts
 
$
759

 
$
616

 
$
2,179

 
$
(3,088
)
 
$
466

Year Ended December, 31 2016
 
 
Allowance for doubtful accounts
 
$
418

 
$
628

 
$
2,456

 
$
(2,743
)
 
$
759