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Accounts Receivable, net
12 Months Ended
Dec. 31, 2016
Receivables [Abstract]  
Accounts Receivable, net
Accounts Receivable, net

Accounts receivable at December 31, 2016 and 2015 were as follows (in thousands):
 
December 31,
 
2016
 
2015
Trade accounts receivable, net of allowance
 
 
 
of $14,337 and $2,528, respectively
$
89,096

 
$
166,256

Unbilled receivables
30,882

 
40,033

Taxes receivable
42,870

 
34,163

Affiliated (1)
717

 
3,966

Other receivables
3,852

 
1,773

Total accounts receivable
$
167,417

 
$
246,191

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