Valuation and Qualifying Accounts and Reserves (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for uncollectible accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 3,486	$ 4,720	$ 7,402
Charged to Expense	(413)	257	1,051
Deductions	645	1,491	3,733
Balance at End of Year	2,428	3,486	4,720
Valuation allowance for deferred tax assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	37,593	31,760	32,481
Charged to Expense	0	5,833	0
Deductions	1,676	0	721
Balance at End of Year	$ 35,917	$ 37,593	$ 31,760