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Fair Value Measurements (Details 2) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Fair value of long-term debt estimated using quoted market prices or discounted future cash flows
Fair value of long-term debt, including current maturities	$ 423,316	$ 450,940	$ 472,714
Fair value in excess of carrying value	$ 2,612	$ 3,116	$ 16,498

X

- Definition

Fair value in excess of less than carrying value.

+ References

No definition available.

+ Details

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

X

- Definition

Fair Value Of Financial Instruments.

+ References

No definition available.

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X

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13476-108611

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