Marketing agreement accrual.

No definition available.

Name:	ande_MarketingAgreementAccrual
Namespace Prefix:	ande_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum Period In Which Contracts For Sale Of Grain To Processors Or Other Consumers Extend

+ References

No definition available.

+ Details

Name:	ande_MaximumPeriodInWhichContractsForSaleOfGrainToProcessorsOrOtherConsumersExtend
Namespace Prefix:	ande_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Property subject to or available for leases statutory life maximum.

+ References

No definition available.

+ Details

Name:	ande_PropertySubjectToOrAvailableForLeasesStatutoryLifeMaximum
Namespace Prefix:	ande_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Property subject to or available for leases statutory life minimum.

+ References

No definition available.

+ Details

Name:	ande_PropertySubjectToOrAvailableForLeasesStatutoryLifeMinimum
Namespace Prefix:	ande_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Summary of significant accounting policies.

+ References

No definition available.

+ Details

Name:	ande_SummaryOfSignificantAccountingPoliciesTextualAbstract
Namespace Prefix:	ande_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 720
-SubTopic 35
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848

+ Details

Name:	us-gaap_AdvertisingExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

+ Details

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

- Definition

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756

+ Details

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

- Definition

Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements.

+ References

No definition available.

+ Details

Name:	us-gaap_DeferredCompensationSharebasedArrangementsLiabilityCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Stock Split
-URI http://asc.fasb.org/extlink&oid=6525746

+ Details

Name:	us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_OperatingExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ande_BargesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=ande_BuildingsAndStorageFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Summary of Significant Accounting Policies (Details Textual) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Summary of Significant Accounting Policies (Textual) [Abstract]
Maximum period in which contracts for the sale of grain to processors or other consumers extend	1 year
Marketing balance payable	$ 5.8	$ 4.5
Property subject to or available for leases statutory life minimum	40 years
Property subject to or available for leases statutory life maximum	50 years
Amortization of capitalized computer software costs	$ 7.1	6.5	$ 3.8
Unamortized computer software	47.2	52.2
Accrued compensation liability	$ 9.7	11.1
Stock split, conversion ratio	1.5
Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Intangible assets estimated useful life	3 years
Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Intangible assets estimated useful life	10 years
Operating, administrative and general expenses
Summary of Significant Accounting Policies (Textual) [Abstract]
Advertising expense	$ 4.9	$ 5.2	$ 4.5
Barges \| Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	30 years
Barges \| Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	40 years
Land Improvements
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	16 years
Leasehold Improvements \| Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	3 years
Leasehold Improvements \| Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	20 years
Buildings and Storage Facilities \| Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	10 years
Buildings and Storage Facilities \| Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	40 years
Machinery and Equipment \| Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	3 years
Machinery and Equipment \| Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	20 years