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Schedule II - Valuation and Qualifying Account
 12 Months Ended
Dec. 31, 2018
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Account
Schedule II - Valuation and Qualifying Account
(In thousands)
 
 
Balance at Beginning of Period
 
Additions Charged to / Recovered from Expense
 
Write-offs
 
Other (1)
 
Balance at End of Period
Year ended December 31, 2018
 
 
 
 
 
 
 
 
 
 
Reserve for doubtful accounts
 
$
2,590

 
$
605

 
$
(560
)
 
$
15

 
$
2,650

 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2017
 
 
 
 
 
 
 
 
 
 
Reserve for doubtful accounts
 
$
3,139

 
$
(202
)
 
$
(428
)
 
$
81

 
$
2,590

 
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
 
 
 
 
 
 
 
 
 
 
Reserve for doubtful accounts
 
$
4,136

 
$
(18
)
 
$
(999
)
 
$
20

 
$
3,139

 
 
 
 
 
 
 
 
 
 
 
(1) Comprised primarily of differences due to changes in exchange rate.