Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Allowance for uncollectible accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 2,168	$ 3,340	$ 4,720
Charged to Expense	1,277	(430)	111
Deductions	1,860	742	1,491
Balance at End of Year	1,585	2,168	3,340
Valuation allowance for deferred tax assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	35,917	37,593	31,760
Charged to Expense	0	0	5,833
Deductions	6,116	1,676	0
Balance at End of Year	$ 29,801	$ 35,917	$ 37,593