Annual report pursuant to Section 13 and 15(d)

Receivables and Allowance for Doubtful Receivables

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Receivables and Allowance for Doubtful Receivables
12 Months Ended
Dec. 31, 2017
Receivables [Abstract]  
Receivables and Allowance for Doubtful Receivables
Receivables and Allowance for Doubtful Receivables
Receivables consist of the following at December 31, 2017 and 2016 (amounts in thousands):
 
2017
 
2016
Trade
$
187,000

 
182,993

Other
1,580

 
1,303

Total receivables
$
188,580

 
184,296



As described in Note 1 of this Form 10-K we receive support from each of the various USF programs: high cost, low income, rural health care, and schools and libraries.  This support was 26%, 24%, and 19% of our revenue for the years ended December 31, 2017, 2016 and 2015, respectively.  We had USF net receivables of $131.8 million and $100.5 million at December 31, 2017 and 2016, respectively.

Changes in the allowance for doubtful receivables during the years ended December 31, 2017, 2016 and 2015 are summarized below (amounts in thousands):
 
 
 
Additions
 
Deductions
 
 
Description
Balance at beginning of year
 
Charged to costs and expenses
 
Charged to other accounts
 
Write-offs net of recoveries
 
Balance at end of year
December 31, 2017
$
4,407

 
5,800

 

 
6,215

 
3,992

December 31, 2016
$
3,630

 
8,516

 

 
7,739

 
4,407

December 31, 2015
$
4,542

 
6,359

 

 
7,271

 
3,630