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Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]  
Schedule II - Valuation and Qualifying Accounts
Schedule II—Valuation and Qualifying Accounts
Description
 
Balance at
beginning of
period
 
Charges to costs
and expenses
 
Recoveries
and write
offs
 
Balance at end
of period
 
 
(In thousands)
Allowance for doubtful trade receivables
 
 
 
 
 
 
 
 
December 31, 2016
 
$
7,739

 
$
1,259

 
$
(3,428
)
 
$
5,570

December 31, 2015
 
6,241

 
5,741

 
(4,243
)
 
7,739

December 31, 2014
 
2,364

 
4,832

 
(955
)
 
6,241

Allowance for excess and slow moving inventory
 
 
 
 
 
 
 
 
December 31, 2016
 
$
39,247

 
$
5,748

 
$
653

 
$
45,648

December 31, 2015
 
34,607

 
8,512

 
(3,872
)
 
39,247

December 31, 2014
 
33,216

 
3,951

 
(2,560
)
 
34,607