Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 36,344	$ 36,933
Reclassifications of amortization of prior service credit and actuarial loss, net of tax of $3 and $6, respectively	10	18
Other comprehensive income (loss)	(604)	547
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	35,740	37,480
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(478)	(1,951)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	478	1,951
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(126)	2,498
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Statement of Comprehensive Income [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(48)	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	48	0
Accumulated (Gain) Loss from Commodity Contracts Cash Flows Hedges [Member]
Statement of Comprehensive Income [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(440)	(1,969)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	440	1,969
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	22	2,498
Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges [Member]
Statement of Comprehensive Income [Abstract]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(48)	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	48	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	$ (148)	$ 0