Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenues from external customers	$ 836,595	$ 859,612	$ 2,682,273	$ 2,811,735
Income (loss) before income taxes	5,005	4,445	(19,630)	4,646
Identifiable assets	1,964,160	1,984,411	1,964,160	1,984,411	$ 2,232,849
Operating Segments \| Grain
Segment Reporting Information [Line Items]
Revenues from external customers	497,613	550,189	1,464,588	1,611,992
Income (loss) before income taxes	2,641	1,879	4,497	(28,563)
Identifiable assets	799,655	721,412	799,655	721,412	961,114
Operating Segments \| Ethanol
Segment Reporting Information [Line Items]
Revenues from external customers	191,531	139,413	533,515	396,626
Income (loss) before income taxes	6,098	9,541	12,474	13,048
Identifiable assets	173,545	174,822	173,545	174,822	171,115
Operating Segments \| Plant Nutrient
Segment Reporting Information [Line Items]
Revenues from external customers	103,620	101,770	514,943	588,797
Income (loss) before income taxes	(7,920)	(7,231)	(27,074)	18,008
Identifiable assets	389,396	462,328	389,396	462,328	484,455
Operating Segments \| Rail
Segment Reporting Information [Line Items]
Revenues from external customers	43,093	38,201	121,632	118,152
Income (loss) before income taxes	6,127	6,754	18,065	22,698
Identifiable assets	446,884	383,631	446,884	383,631	398,446
Operating Segments \| Retail
Segment Reporting Information [Line Items]
Revenues from external customers	738	30,039	47,595	96,168
Income (loss) before income taxes	4,424	(1,578)	(9,140)	(2,644)
Identifiable assets	9,138	42,880	9,138	42,880	31,257
Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenues from external customers	399	396	1,413	3,116
Segment Reconciling Items \| Grain
Segment Reporting Information [Line Items]
Revenues from external customers	72	7	279	1,632
Segment Reconciling Items \| Plant Nutrient
Segment Reporting Information [Line Items]
Revenues from external customers	0	61	241	422
Segment Reconciling Items \| Rail
Segment Reporting Information [Line Items]
Revenues from external customers	327	328	893	1,062
Other
Segment Reporting Information [Line Items]
Income (loss) before income taxes	(6,448)	(6,539)	(18,525)	(19,612)
Identifiable assets	145,542	199,338	145,542	199,338	$ 186,462
Noncontrolling interests
Segment Reporting Information [Line Items]
Income (loss) before income taxes	$ 83	$ 1,619	$ 73	$ 1,711

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 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_Assets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68072869&loc=d3e41242-110953

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

+ Details

Name:	us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

Name:	us-gaap_SalesRevenueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ande_GrainMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ande_EthanolMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ande_PlantNutrientMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ande_RailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=ande_RetailMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_MaterialReconcilingItemsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConsolidationItemsAxis=us-gaap_ReportableLegalEntitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: