Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Tax expense recognized on the amortization of prior service cost	$ 11,000	$ 18,082	$ 550,000
Tax expense recognized on the net gain (loss)	(37,000)	242,699	93,000
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax	(165,000)	0	0
Accumulated Other Comprehensive Income (Loss) [Line Items]
Tax expense recognized on the amortization of prior service cost	11,000	18,082	550,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	37,000	(242,699)	(93,000)
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Interest Rate Swaps During Period, Tax	(165,000)	0	0
Unrealized Gain (Loss) On Cash Flow Hedging Instruments, Tax	(501,000)	(369,000)	2,702,000
Accumulated (Gain) Loss from Commodity Contracts Cash Flows Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(17,000)	(963,000)	(1,838,000)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	$ 135,000	$ (12,000)	$ 12,000