Schedule II - Valuation and Qualifying Accounts (Detail) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 87,000	$ 82,000	$ 82,000
Charge (Recovery) to Costs and Expenses		43,000	5,000	0
Other Charges, Deductions	[1]	0	0	0
Balance at End of Period		$ 130,000	$ 87,000	$ 82,000

[1] Reflects uncollectible accounts written off, net of recoveries.