NATURE OF OPERATIONS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Aug. 31, 2009	Aug. 31, 2008
Nature of operations
Redemption price of Class A Common Voting Membership Stock (in dollars per share)	$ 150
Non-voting preferred stock, issued (in shares)		0	0
Non-voting preferred stock, outstanding (in shares)		0	0
Non Voting Preferred Stock Authorised (in shares)		10,000	10,000
Non Voting Preferred Stock Authorised Par Value (in dollars per share)		$ 1,000	$ 1,000
Percentage of book value of stock, paid as a consideration, in the event of right to recall stock of any member was exercised	25.00%
ProGold Limited Liability Company
Nature of operations
Number of other partners	2
Ownership percentage in joint venture	49.00%
ProGold Limited Liability Company | ACSC
Nature of operations
Ownership percentage in joint venture	51.00%