Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 02, 2018
Property, Plant and Equipment [Line Items]
Restricted Cash and Cash Equivalents	$ 8,700
Summary of Significant Accounting Policies (Textual) [Abstract]
Maximum period in which contracts for the sale of grain to processors or other consumers extend	1 year
Marketing lease agreement term	5 years
Marketing agreement, increase (decrease) in revenue	$ 1,200	$ 0	$ (200)
Property subject to or available for leases statutory life minimum	40 years
Property subject to or available for leases statutory life maximum	50 years
Decrease in retained earnings	$ (626,081)	$ (642,687)
Subsidiaries | Element LLC
Summary of Significant Accounting Policies (Textual) [Abstract]
Noncontrolling interest, ownership percentage by noncontrolling owners				49.00%
Noncontrolling interest ownership percentage by parent				51.00%
Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Intangible assets estimated useful life	1 year
Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Intangible assets estimated useful life	10 years
Barges | Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	30 years
Barges | Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	40 years
Land Improvements
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	16 years
Leasehold Improvements | Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	3 years
Leasehold Improvements | Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	20 years
Buildings and Storage Facilities | Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	10 years
Buildings and Storage Facilities | Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	40 years
Machinery and Equipment | Minimum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	3 years
Machinery and Equipment | Maximum
Summary of Significant Accounting Policies (Textual) [Abstract]
Asset estimated average useful life	20 years