Related Party Transactions (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Related party transactions entered into for the time periods presented
Sales revenues	$ 1,031,458		$ 841,366		$ 510,142
Service fee revenues	22,165	[1]	22,850	[1]	21,310	[1]
Purchases of product	655,686		636,144		454,314
Lease income	6,995	[2]	6,128	[2]	5,431	[2]
Labor and benefits reimbursement	12,140	[3]	10,784	[3]	10,760	[3]
Other expenses	1,093	[4]	192	[4]	0	[4]
Accounts receivable	28,610	[5]	14,730	[5]	14,991	[5]
Accounts payable	$ 17,804	[6]	$ 24,530	[6]	$ 13,930	[6]

[1] Service fee revenues include management fee, corn origination fee, ethanol and DDG marketing fees, and other commissions.

[2] Lease income includes the lease of the Company’s Albion, Michigan and Clymers, Indiana grain facilities as well as certain railcars to the unconsolidated ethanol LLCs and IANR.

[3] The Company provides all operational labor to the unconsolidated ethanol LLCs and charges them an amount equal to the Company’s costs of the related services.

[4] Other expenses include payments to IANR for repair facility rent and use of their railroad reporting mark, payment to LTG for the lease of railcars and other various expenses.

[5] Accounts receivable represents amounts due from related parties for sales of corn, leasing revenue and service fees.

[6] Accounts payable represents amounts due to related parties for purchases of ethanol.