Stockholder's Equity - Accumulated Other Comprehensive Income (Loss) - Reclassifications of Accumulated Other Comprehensive Loss (Detail) - USD ($) shares in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Amortization of pension and postretirement items:
Tax benefit	$ (11,615,000)	$ (13,506,000)
Derivative, Gain (Loss) on Derivative, Net	(171,000)	3,491,000
Stock Issued During Period, Shares, Dividend Reinvestment Plan			0.1
Stock Issued During Period, Value, Dividend Reinvestment Plan			$ 136.26
Proceeds from Issuance of Common Stock, Dividend Reinvestment Plan			$ 4,500,000
Interest Rate Swap [Member] | Derivatives designated as hedging instrument [Member] | Interest Expense [Member]
Amortization of pension and postretirement items:
Derivative, Gain (Loss) on Derivative, Net	$ 65,000	$ 0