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Accounts Receivable, Net and Revenue Concentrations (Tables)
3 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Schedule of Accounts Receivable and Allowance for Doubtful Accounts
Accounts receivable, net were as follows:
(In thousands)
March 31, 2017
 
December 31, 2016
Trade receivables, gross
$
124,399

 
$
120,965

Allowance for doubtful accounts
(945
)
 
(904
)
Allowance for sales returns
(501
)
 
(539
)
Net trade receivables
122,953

 
119,522

Other
6,278

 
5,070

Accounts receivable, net
$
129,231

 
$
124,592


Allowance for Doubtful Accounts
Changes in the allowance for doubtful accounts were as follows:
(In thousands)
Three Months Ended March 31,
2017
 
2016
Balance at beginning of period
$
904

 
$
822

Additions (reductions) to costs and expenses
23

 
(40
)
(Write-offs)/Foreign exchange effects
18

 
17

Balance at end of period
$
945

 
$
799

Schedule of Significant Customers to Net Sales
Net sales to the following customers totaled more than 10% of our net sales:
 
Three Months Ended March 31,
 
2017
 
2016
 
$ (thousands)
 
% of Net Sales
 
$ (thousands)
 
% of Net Sales
Comcast Corporation
$
42,247

 
26.2
%
 
$
39,609

 
26.3
%
DIRECTV
16,632

 
10.3

 
16,819

 
11.2

Schedule of Significant Customers to Accounts Receivable
Trade receivables associated with these significant customers that totaled more than 10% of our accounts receivable, net were as follows:
 
March 31, 2017
 
December 31, 2016
 
$ (thousands)
 
% of Accounts Receivable, Net
 
$ (thousands)
 
% of Accounts Receivable, Net
Comcast Corporation
$
25,156

 
19.5
%
 
$
23,716

 
19.0
%
DIRECTV
15,299

 
11.8

 
12,878

 
10.3