Derivatives (Details Textual)	12 Months Ended
Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Maximum period in which contracts for the sale of grain to processors or other consumers extend	1 year

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

No definition available.

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