CHANGE IN ACCOUNTING STANDARDS (Details)		6 Months Ended		12 Months Ended
	Jan. 01, 2018 USD ($) installment $ / bu	Jun. 30, 2018 item	Jun. 30, 2017 item	Dec. 31, 2017 USD ($) $ / bu
Revenue from Contract with Customer [Abstract]
Bushels of corn | item		15,490,480	15,490,480
Annual contractual payments to Cargill to arrange for the delivery of the corn and other agency services | $	$ 60,000			$ 70,000
Number Of Installments | installment	4
Incentive Payment Per Bushel to Members on Delivery of Corn under Method A	0.05			0.05
Agency Fee Per Bushel from Members to Arrange Corn under Method B	0.02			0.02