Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 16,133	$ 17,051	$ 52,477	$ 53,985
Reclassifications of amortization of prior service credit and actuarial loss, net of tax of $3 and $6, $5 and $13, respectively	12	18	21	35
Other comprehensive income (loss)	(1,076)	(480)	(1,680)	67
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	15,057	16,571	50,797	54,052
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(247)	(2,139)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			247	2,139
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(1,433)	2,206
Reclassifications of amortization of prior service credit and actuarial loss, net of tax of $3 and $6, $5 and $13, respectively	12	18	21	35
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	(94)	0	(142)	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	94	0	142	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	313	(205)	(126)	(2,174)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(313)	205	126	2,174
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(2,065)	(293)	(2,045)	2,206
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			(142)	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			142	0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	$ 758	$ 0	$ 612	$ 0