Derivative Financial Instruments (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Gains or losses on derivative instruments, statement of income
Ineffectiveness - amount of gain (losses) recognized in income on related hedged items	$ (151,000)	$ (1,600,000)	$ 145,000	$ 17,000
Derivative, Excluded Component, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of Goods Sold.	Cost of Goods Sold.	Cost of Goods Sold.	Cost of Goods Sold.
Gain excluded from hedge effectiveness testing	$ 817,000	$ 1,300,000	$ 1,900,000	$ 3,200,000
Amount of gain (loss) related to cash flow hedges	10,000,000.0	(2,300,000)	6,800,000	41,800,000
Net gains (losses) reclassified	(7,100,000)	$ 23,200,000	(7,700,000)	$ 30,400,000
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	(3,600,000)		$ (3,600,000)
Period Within Which The Company Expects To Reclassify Net Gains On Derivative Instruments From AOCI to Earnings			12 months
Futures | Commodity contract
Commodity contract commitments
Fair value of derivatives including required margin deposits	$ 13,000,000.0		$ 13,000,000.0		$ 24,900,000
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Current		Other Assets, Current		Other Assets, Current