Derivatives Hedges and Financial Instruments	3 Months Ended
Mar. 31, 2022
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivatives Hedges and Financial Instruments	6. Derivatives, Hedges and Financial Instruments Natural Gas Contracts Periodically, we entered into certain forward natural gas contracts (“natural gas contracts”), which are accounted for on a mark-to-market basis. We are utilizing these natural gas contracts as economic hedges for risk management purposes but are not designated as hedging instruments. At March 31, 2022 and December 31, 2021, we had no outstanding natural gas contracts. When present the valuations of the natural gas contracts are classified as Level 2. For the three months ended March 31, 2021, we recognized a gain of $2.7 million (includes a realized gain of $1.5 million), (none for the three months ended March 31, 2022). The gain is classified as a reduction of cost of sales.

The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-URI http://asc.fasb.org/topic&trid=2229140

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 40
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=123477628&loc=d3e90205-114008

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