2. Segments - Schedule of Financial Date for Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Sales	$ 422,860	$ 227,621	$ 765,233	$ 433,797
Cost of goods sold	405,156	221,367	746,460	428,530
Income (loss) before provision for income taxes	4,841	1,582	(8,385)	(5,627)
Depreciation and amortization	9,018	3,340	17,670	6,748
Interest expense	6,536	1,005	12,769	2,020
Intersubsegment Eliminations [Member]
Net Sales	(2,351)	(621)	(4,366)	(1,656)
Cost of goods sold	(4,602)	(2,778)	(8,605)	(5,211)
Ethanol Production [Member]
Net Sales	271,890	109,045	501,394	208,042
Cost of goods sold	260,237	105,623	496,246	207,160
Income (loss) before provision for income taxes	794	1,013	(16,330)	(4,199)
Depreciation and amortization	8,793	3,206	17,209	6,390
Interest expense	6,180	922	12,080	1,844
Ethanol Production [Member] | External Customers [Member]
Net Sales	271,630	108,960	500,871	207,957
Ethanol Production [Member] | Intersegment Net Sales [Member]
Net Sales	260	85	523	85
Marketing and Distribution [Member]
Net Sales	153,321	119,497	268,205	227,411
Cost of goods sold	149,521	118,522	258,819	226,581
Income (loss) before provision for income taxes	2,209	(516)	6,178	(2,131)
Depreciation and amortization	0	15	3	142
Interest expense	356	83	689	176
Marketing and Distribution [Member] | External Customers [Member]
Net Sales	151,230	118,661	264,362	225,840
Marketing and Distribution [Member] | Intersegment Net Sales [Member]
Net Sales	2,091	836	3,843	1,571
Corporate Activities [Member]
Income (loss) before provision for income taxes	1,838	1,085	1,767	703
Depreciation and amortization	225	119	458	216
Interest expense	$ 0	$ 0	$ 0	$ 0