Derivatives (Details Textuals) (USD $)	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010
Derivatives (Textuals) [Abstract]
Maximum period in which contracts for the sale of grain to processors or other consumers extend	1 year
Estimated fair value of inventory	$ 78,200,000	$ 27,300,000	$ 6,200,000
Loss on swaptions	0
Interest rate cap [Member]
Derivative [Line Items]
Number of derivative instruments held	3
Notional amount of interest rate caps	$ 20,000,000