Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Loss (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2024	Nov. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			$ (2,738)	$ (1,379)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			(309)	268
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(1,088)	(26)
Net current-period other comprehensive income (loss)	$ (2,559)	$ 1,922	(1,397)	242
Ending balance	(4,135)	(1,137)	(4,135)	(1,137)
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan			56,800
Equity Issued in Business Combination, Fair Value Disclosure					$ 366,400
Proceeds from Issuance of Senior Long-Term Debt			550,000
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan			56,800
Maximum [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Proceeds from Stock Plans			75,000
Proceeds from Stock Plans			75,000
UnrealizedGainsLossesFromDefinedBenefitPensionAndPostretirementPlanItems [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(2,584)	(2,506)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			41	32
Net current-period other comprehensive income (loss)			41	32
Ending balance	(2,543)	(2,474)	(2,543)	(2,474)
Accumulated (Gain) Loss from Commodity Contracts Cash Flows Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			(274)	1,092
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(609)	1,385	1,031	(660)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	63	328	(698)	202
Net current-period other comprehensive income (loss)			333	(458)
Ending balance	59	634	59	634
Accumulated (Gain) Loss from Interest Rate Swap Cash Flows Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance			120	35
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(1,851)	316	(1,340)	928
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax			(431)	(260)
Net current-period other comprehensive income (loss)			(1,771)	668
Ending balance	$ (1,651)	$ 703	(1,651)	$ 703
Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares Issued, Price Per Share						$ 82.72
Proceeds from Issuance of Senior Long-Term Debt			$ 4,400