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Accounts Receivable
 6 Months Ended
Jun. 30, 2015
Accounts Receivable, Net [Abstract]  
Accounts Receivable
Accounts Receivable
Accounts receivable consist of the following:
 
 
June 30,
2015
 
December 31,
2014
Trade customers
 
$
575,609

 
$
525,546

Affiliates
 
—

 
437

Allowance for doubtful accounts
 
(13,468
)
 
(13,468
)
 
 
562,141

 
512,515

Federal and state taxes
 
11,746

 
8,919

Other
 
26,835

 
39,232

Accounts receivable, net
 
$
600,722

 
$
560,666