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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2016
Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts
Schedule II - Valuation and Qualifying Accounts

 
Beginning Balance
 
Additions
 
Deductions
 
Ending Balance
 
(In thousands)
Year ended December 31, 2016
 
 
 
 
 
 
 
Allowance for excess slow-moving and obsolete inventory
$
29,943

 
$
993

 
$
(3,806
)
 
$
27,130

Year ended December 31, 2015
 
 
 
 
 
 
 
Allowance for excess slow-moving and obsolete inventory
$
4,691

 
$
30,547

 
$
(5,295
)
 
$
29,943

Year ended December 31, 2014
 
 
 
 
 
 
 
Allowance for excess slow-moving and obsolete inventory
$
675

 
$
7,981

 
$
(3,965
)
 
$
4,691