Derivative Financial Instruments (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Gains or losses on derivative instruments, statement of income
Ineffectiveness - amount of gain (loss) recognized in income on related hedged items	$ 72,000	$ (101,000)	$ 68,000
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.
Gain (Loss) excluded from hedge effectiveness testing	$ (786,000)	$ 3,100,000	$ (2,600,000)
Amount of gain (loss) related to cash flow hedges	15,000,000.0	40,900,000	2,800,000
Net gains (losses) reclassified	(11,100,000)	46,100,000	$ 265,000
Price Risk Cash Flow Hedge Unrealized Gain (Loss) to be Reclassified During Next 12 Months	1,200,000
Futures | Commodity contract
Commodity contract commitments
Fair value of derivatives including required margin deposits	$ 23,500,000	$ 24,900,000
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Assets, Current	Other Assets, Current