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Accounts Receivable, net
6 Months Ended
Jun. 30, 2016
Receivables [Abstract]  
Accounts Receivable, net
Accounts Receivable, net

Accounts receivable at June 30, 2016 and December 31, 2015 were as follows (in thousands):
 
June 30,
 
December 31,
 
2016
 
2015
Trade accounts receivable, net of allowance
 
 
 
of $12,421 and $2,528, respectively
$
99,620

 
$
166,256

Unbilled revenue
32,815

 
40,033

Taxes receivable
32,849

 
34,163

Affiliated (1)
608

 
3,966

Other receivables
3,017

 
1,773

Total accounts receivable
$
168,909

 
$
246,191

 
 
 

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