Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues from external customers	$ 852,016	$ 887,879
Income (loss) before income taxes	(5,570)	(22,908)
Identifiable assets	2,161,753	2,319,638	$ 2,232,849
Operating Segments \| Grain
Segment Reporting Information [Line Items]
Revenues from external customers	478,528	538,814
Income (loss) before income taxes	(5,073)	(17,405)
Identifiable assets	884,870	948,802	961,114
Operating Segments \| Ethanol
Segment Reporting Information [Line Items]
Revenues from external customers	154,153	114,693
Income (loss) before income taxes	1,716	(2,680)
Identifiable assets	170,020	177,987	171,115
Operating Segments \| Plant Nutrient
Segment Reporting Information [Line Items]
Revenues from external customers	146,587	166,991
Income (loss) before income taxes	6,672	1,704
Identifiable assets	512,744	591,639	484,455
Operating Segments \| Rail
Segment Reporting Information [Line Items]
Revenues from external customers	40,390	39,609
Income (loss) before income taxes	6,078	9,375
Identifiable assets	415,801	380,347	398,446
Operating Segments \| Retail
Segment Reporting Information [Line Items]
Revenues from external customers	32,358	27,772
Income (loss) before income taxes	(6,846)	(2,076)
Identifiable assets	21,594	46,653	31,257
Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenues from external customers	529	2,077
Segment Reconciling Items \| Grain
Segment Reporting Information [Line Items]
Revenues from external customers	66	1,451
Segment Reconciling Items \| Plant Nutrient
Segment Reporting Information [Line Items]
Revenues from external customers	171	247
Segment Reconciling Items \| Rail
Segment Reporting Information [Line Items]
Revenues from external customers	292	379
Other
Segment Reporting Information [Line Items]
Income (loss) before income taxes	(8,171)	(10,900)
Identifiable assets	156,724	174,210	$ 186,462
Noncontrolling interests
Segment Reporting Information [Line Items]
Income (loss) before income taxes	$ 54	$ (926)

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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