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Equity Method Investments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 15, 2017
Jul. 03, 2017
Jun. 30, 2017
Jun. 28, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Jun. 26, 2017
Schedule of Equity Method Investments [Line Items]                  
Proceeds from settlement of debt $ 14,263                
Return of equity method investment             $ 22,832 $ 0  
Pacific Ethanol Central, LLC                  
Schedule of Equity Method Investments [Line Items]                  
Notes receivable, net   $ 14,008              
ICP                  
Schedule of Equity Method Investments [Line Items]                  
Dividends payable, amount     $ 2,765           $ 22,000
ICP                  
Schedule of Equity Method Investments [Line Items]                  
Equity method ownership percentage   30.00%     30.00%   30.00%    
Gain on sale of equity method investment   $ 9,000              
Gain on sale of equity method investment         $ 11,381   $ 11,381    
Return of equity method investment     $ 830 $ 6,600          
Related party sales to MGPI         0 $ 6,700 17,672 19,639  
Depreciation and amortization         $ 0 $ 738 $ 1,720 $ 2,221