Nature of Operations and Basis of Presentation (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($) segment
Long-term Purchase Commitment [Line Items]
Number of operating segments | segment	3
Cash received	$ 2.2
Estimated asset retirement obligation	1.9
Gain on the assumption of third-party asset retirement obligation	$ 0.3
Caddo Creek
Long-term Purchase Commitment [Line Items]
Membership interest	100.00%
HLCP Ethanol Holdco, LLC
Long-term Purchase Commitment [Line Items]
Proceeds and associated gain from the post-closing purchase price adjustment, as a result of the sale of equity method investment	$ 1.2
Number of contingent earn-out arrangements | segment	2
Earn-out, project term	4 years
Minimum | HLCP Ethanol Holdco, LLC
Long-term Purchase Commitment [Line Items]
Earn-out payments	$ 0.0
Maximum | HLCP Ethanol Holdco, LLC
Long-term Purchase Commitment [Line Items]
Earn-out payments	$ 12.9