Employee Benefit Plans (Details Textuals) (USD $) In Millions	3 Months Ended
Mar. 31, 2010
Employee Benefit Plans (Textuals) [Abstract]
Adjustment of deferred tax assets associated with postretirement benefit	$ 1.5

Name:

ande_AdjustmentOfDeferredTaxAssetsAssociatedWithPostretirementBenefit

Namespace Prefix:

ande

Data Type:

xbrli:monetaryItemType

Balance Type:

debit

Period Type:

duration