Fair Value Measurements (Details Textual)	12 Months Ended
Dec. 31, 2011
Fair Value Measurements (Textual) [Abstract]
Maturity period of long term notes payable and debenture bonds	10 years

Maturity period of long term notes payable and debenture bonds.

No definition available.

Name:	ande_MaturityPeriodOfLongTermNotesPayableAndDebentureBonds
Namespace Prefix:	ande_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration