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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  |  | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 03, 2017 | Jun. 30, 2017 | Jun. 28, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Aug. 01, 2017 | Jun. 26, 2017
Subsequent Event [Line Items] |  |  |  |  |  |  |
Return of equity method investment |  |  |  | $ 299 | $ 0 |  |
Subsequent Event | Special Dividend |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Dividends payable, amount |  |  |  |  |  | $ 14,625 |
Dividends payable (in dollars per share) |  |  |  |  |  | $ 0.85 |
Subsequent Event | Quarterly Dividend |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Dividends payable (in dollars per share) |  |  |  |  |  | $ 0.04 |
Pacific Ethanol Central, LLC | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Notes receivable, net | $ 14,008 |  |  |  |  |  |
Loans receivable, term | 18 months |  |  |  |  |  |
Pacific Ethanol Central, LLC | Subsequent Event | LIBOR |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate, first three months (as a percent) | 5.00% |  |  |  |  |  |
Basis spread on variable rate, next three months (as a percent) | 8.00% |  |  |  |  |  |
Basis spread on variable rate, thereafter (as a percent) | 10.00% |  |  |  |  |  |
ICP |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Dividends payable, amount |  | $ 2,765 |  | $ 2,765 |  |  | $ 22,000
ICP |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Equity method ownership percentage (percent) |  | 30.00% |  | 30.00% |  |  |
Return of equity method investment |  | $ 830 | $ 6,600 | $ 7,131 | $ 3,300 |  |
ICP | Subsequent Event |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Total cash proceeds from sale of equity method investments | $ 9,000 |  |  |  |  |  |

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