Related Party Transactions (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013		Dec. 31, 2012	Sep. 30, 2012
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	$ 262,643		$ 190,908	$ 190,057
The Andersons Albion Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	35,643		30,227	30,625
The Andersons Clymers Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	37,695		33,119	34,962
The Andersons Marathon Ethanol LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	37,844		32,996	36,153
Lansing Trade Group LLC
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	100,071		92,094	86,007
Thompsons Limited [Member]
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	47,477	[1]	0	0
Other
Equity Method Investment Companys Investment Balance In Each Equity Method Investees By Entity [Abstract]
Equity method investments	$ 3,913		$ 2,472	$ 2,310

[1] Thompsons Limited and related U.S. operating company