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Schedule II - Valuation and Qualifying Accounts and Reserves
12 Months Ended
Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts and Reserves
Schedule II — Valuation and Qualifying Accounts and Reserves
 
 
 
Additions
 
 
 
 
Description
Beginning Balance
 
Charged to Costs and Expenses
 
Charged to Other Accounts
 
Deductions
 
Ending Balance
(in thousands)
2017
 
 
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
$
6,911

 
$
6,250

 
$

 
$
1,176

 
$
11,985

2016
 
 
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
$
4,608

 
$
4,629

 
$

 
$
2,326

 
$
6,911

2015
 
 
 
 
 
 
 
 
 
Allowance for Doubtful Accounts
$
6,136

 
$
4,335

 
$

 
$
5,863

 
$
4,608