Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	$ 189,610	$ 199,061	$ 179,888
The Andersons Albion Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	31,248	32,829	31,075
The Andersons Clymers Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	38,225	40,001	40,106
The Andersons Marathon Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	37,782	43,019	37,577
Lansing Trade Group LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	80,052	81,209	69,175
Other
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	$ 2,303	$ 2,003	$ 1,955