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Accounts Receivable, net
3 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Accounts Receivable, net
Accounts Receivable, net

Accounts receivable at March 31, 2017 and December 31, 2016 were as follows (in thousands):
 
March 31,
 
December 31,
 
2017
 
2016
Trade accounts receivable, net of allowance of
$13,867 and $14,337, respectively
$
103,393

 
$
89,096

Unbilled revenue
32,246

 
30,882

Taxes receivable
39,196

 
42,870

Affiliated (1)
772

 
717

Other receivables
2,804

 
3,852

Total accounts receivable
$
178,411

 
$
167,417

 
 
 

(1) 
Amounts represent expenditures on behalf of non-consolidated affiliates and receivables for aircraft charter income.