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ACCRUED EXPENSES (Tables)
3 Months Ended
Mar. 31, 2016
Payables and Accruals [Abstract]  
Schedule of accrued expenses
Accrued expenses consisted of the following:
 
March 31,
2016
 
December 31,
2015
Inventory-related accruals
$
583,287

 
$
548,800

Inventory supply and intermediation arrangements
274,668

 
252,380

Accrued transportation costs
87,972

 
91,546

Renewable energy credit obligations
45,729

 
19,472

Excise and sales tax payable
41,110

 
34,129

Customer deposits
26,656

 
20,395

Accrued utilities
24,780

 
25,192

Accrued interest
23,143

 
22,313

Accrued salaries and benefits
12,290

 
61,011

Accrued construction in progress
6,709

 
7,400

Other
44,050

 
34,797

Total accrued expenses
$
1,170,394

 
$
1,117,435