PROGOLD LIMITED LIABILITY COMPANY (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Financial information for ProGold LLC
Current Assets	$ 583	$ 551	$ 514
Long-Term Assets	39,192	40,875	39,843
Total Assets	39,775	41,426	40,357
Current Liabilities	1	201	5
Long-Term Liabilities	583
Total Liabilities	584	201	5
Members' Equity	39,191	41,225	40,352
Total Liabilities and Members' Equity	39,775	41,426	40,357
Rent Revenue on Operating Lease	8,787	11,520	22,873
Expenses	1,417	1,534	2,905
Net Income	$ 7,370	$ 9,986	$ 19,968
ProGold LLC
ProGold Limited Liability Company
Ownership percentage in joint venture	49.00%